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Finding the Fourth Proportional to 502.88, 693.97 and 306.36

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Solution

The fourth proportional to 502.88, 693.97 and 306.36 is: 422.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.88 : 693.97 = 306.36 : x
  2. Step 2: Convert to fraction form
    502.88/693.97 = 306.36/x
  3. Step 3: Cross multiply
    502.88x = 693.97 × 306.36
  4. Step 4: Simplify right side
    502.88x = 212,603.88
  5. Step 5: Solve for x
    x = 212,603.88/502.88
  6. Step 6: Final answer
    x = 422.78

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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.