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Finding the Fourth Proportional to 502.90, 753.72 and 411.76

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Solution

The fourth proportional to 502.90, 753.72 and 411.76 is: 617.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.90 : 753.72 = 411.76 : x
  2. Step 2: Convert to fraction form
    502.90/753.72 = 411.76/x
  3. Step 3: Cross multiply
    502.90x = 753.72 × 411.76
  4. Step 4: Simplify right side
    502.90x = 310,351.75
  5. Step 5: Solve for x
    x = 310,351.75/502.90
  6. Step 6: Final answer
    x = 617.12

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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.