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Finding the Fourth Proportional to 502.38, 693.58 and 397.88

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Solution

The fourth proportional to 502.38, 693.58 and 397.88 is: 549.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.38 : 693.58 = 397.88 : x
  2. Step 2: Convert to fraction form
    502.38/693.58 = 397.88/x
  3. Step 3: Cross multiply
    502.38x = 693.58 × 397.88
  4. Step 4: Simplify right side
    502.38x = 275,961.61
  5. Step 5: Solve for x
    x = 275,961.61/502.38
  6. Step 6: Final answer
    x = 549.31

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1.5x scale

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.