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Finding the Fourth Proportional to 391,361.60, 587,042.40 and 266,945.60

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Solution

The fourth proportional to 391,361.60, 587,042.40 and 266,945.60 is: 400,418.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,361.60 : 587,042.40 = 266,945.60 : x
  2. Step 2: Convert to fraction form
    391,361.60/587,042.40 = 266,945.60/x
  3. Step 3: Cross multiply
    391,361.60x = 587,042.40 × 266,945.60
  4. Step 4: Simplify right side
    391,361.60x = 156,708,385,693.44
  5. Step 5: Solve for x
    x = 156,708,385,693.44/391,361.60
  6. Step 6: Final answer
    x = 400,418.40

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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.