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Finding the Fourth Proportional to 638,761.20, 958,141.80 and 524,599.80

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Solution

The fourth proportional to 638,761.20, 958,141.80 and 524,599.80 is: 786,899.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,761.20 : 958,141.80 = 524,599.80 : x
  2. Step 2: Convert to fraction form
    638,761.20/958,141.80 = 524,599.80/x
  3. Step 3: Cross multiply
    638,761.20x = 958,141.80 × 524,599.80
  4. Step 4: Simplify right side
    638,761.20x = 502,640,996,651.64
  5. Step 5: Solve for x
    x = 502,640,996,651.64/638,761.20
  6. Step 6: Final answer
    x = 786,899.70

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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.