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Finding the Fourth Proportional to 425,772.17, 638,707.67 and 141,488.09

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Solution

The fourth proportional to 425,772.17, 638,707.67 and 141,488.09 is: 212,248.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,772.17 : 638,707.67 = 141,488.09 : x
  2. Step 2: Convert to fraction form
    425,772.17/638,707.67 = 141,488.09/x
  3. Step 3: Cross multiply
    425,772.17x = 638,707.67 × 141,488.09
  4. Step 4: Simplify right side
    425,772.17x = 90,369,529,716.56
  5. Step 5: Solve for x
    x = 90,369,529,716.56/425,772.17
  6. Step 6: Final answer
    x = 212,248.56

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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.