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Finding the Fourth Proportional to 504.28, 695.18 and 392.39

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Solution

The fourth proportional to 504.28, 695.18 and 392.39 is: 540.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.28 : 695.18 = 392.39 : x
  2. Step 2: Convert to fraction form
    504.28/695.18 = 392.39/x
  3. Step 3: Cross multiply
    504.28x = 695.18 × 392.39
  4. Step 4: Simplify right side
    504.28x = 272,785.70
  5. Step 5: Solve for x
    x = 272,785.70/504.28
  6. Step 6: Final answer
    x = 540.95

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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.