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Finding the Fourth Proportional to 438,931.88, 658,397.81 and 123,388.77

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Solution

The fourth proportional to 438,931.88, 658,397.81 and 123,388.77 is: 185,083.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,931.88 : 658,397.81 = 123,388.77 : x
  2. Step 2: Convert to fraction form
    438,931.88/658,397.81 = 123,388.77/x
  3. Step 3: Cross multiply
    438,931.88x = 658,397.81 × 123,388.77
  4. Step 4: Simplify right side
    438,931.88x = 81,238,895,329.65
  5. Step 5: Solve for x
    x = 81,238,895,329.65/438,931.88
  6. Step 6: Final answer
    x = 185,083.15

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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.