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Finding the Fourth Proportional to 503.17, 693.43 and 392.47

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Solution

The fourth proportional to 503.17, 693.43 and 392.47 is: 540.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.17 : 693.43 = 392.47 : x
  2. Step 2: Convert to fraction form
    503.17/693.43 = 392.47/x
  3. Step 3: Cross multiply
    503.17x = 693.43 × 392.47
  4. Step 4: Simplify right side
    503.17x = 272,150.47
  5. Step 5: Solve for x
    x = 272,150.47/503.17
  6. Step 6: Final answer
    x = 540.87

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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.