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Finding the Fourth Proportional to 502.58, 693.54 and 306.21

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Solution

The fourth proportional to 502.58, 693.54 and 306.21 is: 422.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.58 : 693.54 = 306.21 : x
  2. Step 2: Convert to fraction form
    502.58/693.54 = 306.21/x
  3. Step 3: Cross multiply
    502.58x = 693.54 × 306.21
  4. Step 4: Simplify right side
    502.58x = 212,368.88
  5. Step 5: Solve for x
    x = 212,368.88/502.58
  6. Step 6: Final answer
    x = 422.56

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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.