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Finding the Fourth Proportional to 642,635.20, 963,031.20 and 472,830.40

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Solution

The fourth proportional to 642,635.20, 963,031.20 and 472,830.40 is: 708,567.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,635.20 : 963,031.20 = 472,830.40 : x
  2. Step 2: Convert to fraction form
    642,635.20/963,031.20 = 472,830.40/x
  3. Step 3: Cross multiply
    642,635.20x = 963,031.20 × 472,830.40
  4. Step 4: Simplify right side
    642,635.20x = 455,350,427,508.48
  5. Step 5: Solve for x
    x = 455,350,427,508.48/642,635.20
  6. Step 6: Final answer
    x = 708,567.52

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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.