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Finding the Fourth Proportional to 424,805.34, 637,115.57 and 140,428.70

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Solution

The fourth proportional to 424,805.34, 637,115.57 and 140,428.70 is: 210,612.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,805.34 : 637,115.57 = 140,428.70 : x
  2. Step 2: Convert to fraction form
    424,805.34/637,115.57 = 140,428.70/x
  3. Step 3: Cross multiply
    424,805.34x = 637,115.57 × 140,428.70
  4. Step 4: Simplify right side
    424,805.34x = 89,469,313,188.72
  5. Step 5: Solve for x
    x = 89,469,313,188.72/424,805.34
  6. Step 6: Final answer
    x = 210,612.50

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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.