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Finding the Fourth Proportional to 428,691.18, 591,620.42 and 237,704.57

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Solution

The fourth proportional to 428,691.18, 591,620.42 and 237,704.57 is: 328,047.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,691.18 : 591,620.42 = 237,704.57 : x
  2. Step 2: Convert to fraction form
    428,691.18/591,620.42 = 237,704.57/x
  3. Step 3: Cross multiply
    428,691.18x = 591,620.42 × 237,704.57
  4. Step 4: Simplify right side
    428,691.18x = 140,630,877,539.32
  5. Step 5: Solve for x
    x = 140,630,877,539.32/428,691.18
  6. Step 6: Final answer
    x = 328,047.05

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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.