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Finding the Fourth Proportional to 503.34, 694.92 and 392.64

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Solution

The fourth proportional to 503.34, 694.92 and 392.64 is: 542.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.34 : 694.92 = 392.64 : x
  2. Step 2: Convert to fraction form
    503.34/694.92 = 392.64/x
  3. Step 3: Cross multiply
    503.34x = 694.92 × 392.64
  4. Step 4: Simplify right side
    503.34x = 272,853.39
  5. Step 5: Solve for x
    x = 272,853.39/503.34
  6. Step 6: Final answer
    x = 542.09

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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.