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Finding the Fourth Proportional to 502.64, 694.31 and 393.48

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Solution

The fourth proportional to 502.64, 694.31 and 393.48 is: 543.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.64 : 694.31 = 393.48 : x
  2. Step 2: Convert to fraction form
    502.64/694.31 = 393.48/x
  3. Step 3: Cross multiply
    502.64x = 694.31 × 393.48
  4. Step 4: Simplify right side
    502.64x = 273,195.13
  5. Step 5: Solve for x
    x = 273,195.13/502.64
  6. Step 6: Final answer
    x = 543.53

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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.