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Finding the Fourth Proportional to 688.52, 950.24 and 502.20

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Solution

The fourth proportional to 688.52, 950.24 and 502.20 is: 693.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.52 : 950.24 = 502.20 : x
  2. Step 2: Convert to fraction form
    688.52/950.24 = 502.20/x
  3. Step 3: Cross multiply
    688.52x = 950.24 × 502.20
  4. Step 4: Simplify right side
    688.52x = 477,211.78
  5. Step 5: Solve for x
    x = 477,211.78/688.52
  6. Step 6: Final answer
    x = 693.10

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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.