Home / 813,543,619.80-1,220,315,429.70-431,337,667.80

Finding the Fourth Proportional to 813,543,619.80, 1,220,315,429.70 and 431,337,667.80

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Solution

The fourth proportional to 813,543,619.80, 1,220,315,429.70 and 431,337,667.80 is: 647,006,501.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,543,619.80 : 1,220,315,429.70 = 431,337,667.80 : x
  2. Step 2: Convert to fraction form
    813,543,619.80/1,220,315,429.70 = 431,337,667.80/x
  3. Step 3: Cross multiply
    813,543,619.80x = 1,220,315,429.70 × 431,337,667.80
  4. Step 4: Simplify right side
    813,543,619.80x = 526,368,011,427,152,896
  5. Step 5: Solve for x
    x = 526,368,011,427,152,896/813,543,619.80
  6. Step 6: Final answer
    x = 647,006,501.70

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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.