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Finding the Fourth Proportional to 503.31, 752.79 and 490.02

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Solution

The fourth proportional to 503.31, 752.79 and 490.02 is: 732.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.31 : 752.79 = 490.02 : x
  2. Step 2: Convert to fraction form
    503.31/752.79 = 490.02/x
  3. Step 3: Cross multiply
    503.31x = 752.79 × 490.02
  4. Step 4: Simplify right side
    503.31x = 368,882.16
  5. Step 5: Solve for x
    x = 368,882.16/503.31
  6. Step 6: Final answer
    x = 732.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.