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Finding the Fourth Proportional to 642,479.62, 963,041.25 and 215,610.70

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Solution

The fourth proportional to 642,479.62, 963,041.25 and 215,610.70 is: 323,188.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,479.62 : 963,041.25 = 215,610.70 : x
  2. Step 2: Convert to fraction form
    642,479.62/963,041.25 = 215,610.70/x
  3. Step 3: Cross multiply
    642,479.62x = 963,041.25 × 215,610.70
  4. Step 4: Simplify right side
    642,479.62x = 207,641,996,442.31
  5. Step 5: Solve for x
    x = 207,641,996,442.31/642,479.62
  6. Step 6: Final answer
    x = 323,188.46

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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.