Home / 1,008,002,878.20-1,510,809,923.70-425,735,998.20

Finding the Fourth Proportional to 1,008,002,878.20, 1,510,809,923.70 and 425,735,998.20

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Solution

The fourth proportional to 1,008,002,878.20, 1,510,809,923.70 and 425,735,998.20 is: 638,099,538.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008,002,878.20 : 1,510,809,923.70 = 425,735,998.20 : x
  2. Step 2: Convert to fraction form
    1,008,002,878.20/1,510,809,923.70 = 425,735,998.20/x
  3. Step 3: Cross multiply
    1,008,002,878.20x = 1,510,809,923.70 × 425,735,998.20
  4. Step 4: Simplify right side
    1,008,002,878.20x = 643,206,170,956,885,376
  5. Step 5: Solve for x
    x = 643,206,170,956,885,376/1,008,002,878.20
  6. Step 6: Final answer
    x = 638,099,538.07

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Double scale
Find fourth proportional to 1,008,002,879.20, 1,510,809,925.20 and 425,735,999.20
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.