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Finding the Fourth Proportional to 660,915.38, 991,425.60 and 281,839.35

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Solution

The fourth proportional to 660,915.38, 991,425.60 and 281,839.35 is: 422,781.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,915.38 : 991,425.60 = 281,839.35 : x
  2. Step 2: Convert to fraction form
    660,915.38/991,425.60 = 281,839.35/x
  3. Step 3: Cross multiply
    660,915.38x = 991,425.60 × 281,839.35
  4. Step 4: Simplify right side
    660,915.38x = 279,422,748,169.87
  5. Step 5: Solve for x
    x = 279,422,748,169.87/660,915.38
  6. Step 6: Final answer
    x = 422,781.43

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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.