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Finding the Fourth Proportional to 503.87, 695.52 and 392.90

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Solution

The fourth proportional to 503.87, 695.52 and 392.90 is: 542.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.87 : 695.52 = 392.90 : x
  2. Step 2: Convert to fraction form
    503.87/695.52 = 392.90/x
  3. Step 3: Cross multiply
    503.87x = 695.52 × 392.90
  4. Step 4: Simplify right side
    503.87x = 273,266.33
  5. Step 5: Solve for x
    x = 273,266.33/503.87
  6. Step 6: Final answer
    x = 542.34

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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.