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Finding the Fourth Proportional to 502.81, 753.63 and 445.15

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Solution

The fourth proportional to 502.81, 753.63 and 445.15 is: 667.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.81 : 753.63 = 445.15 : x
  2. Step 2: Convert to fraction form
    502.81/753.63 = 445.15/x
  3. Step 3: Cross multiply
    502.81x = 753.63 × 445.15
  4. Step 4: Simplify right side
    502.81x = 335,474.68
  5. Step 5: Solve for x
    x = 335,474.68/502.81
  6. Step 6: Final answer
    x = 667.20

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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.