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Finding the Fourth Proportional to 425,901.43, 638,713.94 and 141,515.61

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Solution

The fourth proportional to 425,901.43, 638,713.94 and 141,515.61 is: 212,227.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,901.43 : 638,713.94 = 141,515.61 : x
  2. Step 2: Convert to fraction form
    425,901.43/638,713.94 = 141,515.61/x
  3. Step 3: Cross multiply
    425,901.43x = 638,713.94 × 141,515.61
  4. Step 4: Simplify right side
    425,901.43x = 90,387,994,120.64
  5. Step 5: Solve for x
    x = 90,387,994,120.64/425,901.43
  6. Step 6: Final answer
    x = 212,227.50

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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.