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Finding the Fourth Proportional to 415,361.92, 573,390.79 and 243,255.95

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Solution

The fourth proportional to 415,361.92, 573,390.79 and 243,255.95 is: 335,805.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,361.92 : 573,390.79 = 243,255.95 : x
  2. Step 2: Convert to fraction form
    415,361.92/573,390.79 = 243,255.95/x
  3. Step 3: Cross multiply
    415,361.92x = 573,390.79 × 243,255.95
  4. Step 4: Simplify right side
    415,361.92x = 139,480,721,342.70
  5. Step 5: Solve for x
    x = 139,480,721,342.70/415,361.92
  6. Step 6: Final answer
    x = 335,805.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.