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Finding the Fourth Proportional to 425,853.93, 638,781.17 and 238,996.65

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Solution

The fourth proportional to 425,853.93, 638,781.17 and 238,996.65 is: 358,495.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,853.93 : 638,781.17 = 238,996.65 : x
  2. Step 2: Convert to fraction form
    425,853.93/638,781.17 = 238,996.65/x
  3. Step 3: Cross multiply
    425,853.93x = 638,781.17 × 238,996.65
  4. Step 4: Simplify right side
    425,853.93x = 152,666,558,518.10
  5. Step 5: Solve for x
    x = 152,666,558,518.10/425,853.93
  6. Step 6: Final answer
    x = 358,495.13

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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.