Home / 500,923.99-691,345.97-309,998.89

Finding the Fourth Proportional to 500,923.99, 691,345.97 and 309,998.89

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Solution

The fourth proportional to 500,923.99, 691,345.97 and 309,998.89 is: 427,842.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,923.99 : 691,345.97 = 309,998.89 : x
  2. Step 2: Convert to fraction form
    500,923.99/691,345.97 = 309,998.89/x
  3. Step 3: Cross multiply
    500,923.99x = 691,345.97 × 309,998.89
  4. Step 4: Simplify right side
    500,923.99x = 214,316,483,305.97
  5. Step 5: Solve for x
    x = 214,316,483,305.97/500,923.99
  6. Step 6: Final answer
    x = 427,842.32

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.