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Finding the Fourth Proportional to 424,882.48, 637,344.89 and 121,321.66

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Solution

The fourth proportional to 424,882.48, 637,344.89 and 121,321.66 is: 181,988.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,882.48 : 637,344.89 = 121,321.66 : x
  2. Step 2: Convert to fraction form
    424,882.48/637,344.89 = 121,321.66/x
  3. Step 3: Cross multiply
    424,882.48x = 637,344.89 × 121,321.66
  4. Step 4: Simplify right side
    424,882.48x = 77,323,739,283.49
  5. Step 5: Solve for x
    x = 77,323,739,283.49/424,882.48
  6. Step 6: Final answer
    x = 181,988.53

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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.