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Finding the Fourth Proportional to 424,861, 637,291.50 and 129,373

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Solution

The fourth proportional to 424,861, 637,291.50 and 129,373 is: 194,059.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,861 : 637,291.50 = 129,373 : x
  2. Step 2: Convert to fraction form
    424,861/637,291.50 = 129,373/x
  3. Step 3: Cross multiply
    424,861x = 637,291.50 × 129,373
  4. Step 4: Simplify right side
    424,861x = 82,448,313,229.50
  5. Step 5: Solve for x
    x = 82,448,313,229.50/424,861
  6. Step 6: Final answer
    x = 194,059.50

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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.