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Finding the Fourth Proportional to 386,562.62, 579,705 and 133,774.47

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Solution

The fourth proportional to 386,562.62, 579,705 and 133,774.47 is: 200,613.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,562.62 : 579,705 = 133,774.47 : x
  2. Step 2: Convert to fraction form
    386,562.62/579,705 = 133,774.47/x
  3. Step 3: Cross multiply
    386,562.62x = 579,705 × 133,774.47
  4. Step 4: Simplify right side
    386,562.62x = 77,549,729,131.35
  5. Step 5: Solve for x
    x = 77,549,729,131.35/386,562.62
  6. Step 6: Final answer
    x = 200,613.63

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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.