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Finding the Fourth Proportional to 502.27, 693.18 and 305.90

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Solution

The fourth proportional to 502.27, 693.18 and 305.90 is: 422.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.27 : 693.18 = 305.90 : x
  2. Step 2: Convert to fraction form
    502.27/693.18 = 305.90/x
  3. Step 3: Cross multiply
    502.27x = 693.18 × 305.90
  4. Step 4: Simplify right side
    502.27x = 212,040.30
  5. Step 5: Solve for x
    x = 212,040.30/502.27
  6. Step 6: Final answer
    x = 422.17

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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.