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Finding the Fourth Proportional to 642,324.52, 963,502.44 and 215,866.63

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Solution

The fourth proportional to 642,324.52, 963,502.44 and 215,866.63 is: 323,805.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,324.52 : 963,502.44 = 215,866.63 : x
  2. Step 2: Convert to fraction form
    642,324.52/963,502.44 = 215,866.63/x
  3. Step 3: Cross multiply
    642,324.52x = 963,502.44 × 215,866.63
  4. Step 4: Simplify right side
    642,324.52x = 207,988,024,719.58
  5. Step 5: Solve for x
    x = 207,988,024,719.58/642,324.52
  6. Step 6: Final answer
    x = 323,805.21

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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.