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Finding the Fourth Proportional to 658,672.70, 987,425.85 and 434,140.70

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Solution

The fourth proportional to 658,672.70, 987,425.85 and 434,140.70 is: 650,826.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,672.70 : 987,425.85 = 434,140.70 : x
  2. Step 2: Convert to fraction form
    658,672.70/987,425.85 = 434,140.70/x
  3. Step 3: Cross multiply
    658,672.70x = 987,425.85 × 434,140.70
  4. Step 4: Simplify right side
    658,672.70x = 428,681,749,717.10
  5. Step 5: Solve for x
    x = 428,681,749,717.10/658,672.70
  6. Step 6: Final answer
    x = 650,826.65

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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.