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Finding the Fourth Proportional to 553.20, 759.11 and 503.88

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Solution

The fourth proportional to 553.20, 759.11 and 503.88 is: 691.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.20 : 759.11 = 503.88 : x
  2. Step 2: Convert to fraction form
    553.20/759.11 = 503.88/x
  3. Step 3: Cross multiply
    553.20x = 759.11 × 503.88
  4. Step 4: Simplify right side
    553.20x = 382,497.83
  5. Step 5: Solve for x
    x = 382,497.83/553.20
  6. Step 6: Final answer
    x = 691.43

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.