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Finding the Fourth Proportional to 502.25, 753.82 and 420.49

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Solution

The fourth proportional to 502.25, 753.82 and 420.49 is: 631.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.25 : 753.82 = 420.49 : x
  2. Step 2: Convert to fraction form
    502.25/753.82 = 420.49/x
  3. Step 3: Cross multiply
    502.25x = 753.82 × 420.49
  4. Step 4: Simplify right side
    502.25x = 316,974.61
  5. Step 5: Solve for x
    x = 316,974.61/502.25
  6. Step 6: Final answer
    x = 631.12

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1.5x scale

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.