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Finding the Fourth Proportional to 803.25, 1,203.13 and 391.52

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Solution

The fourth proportional to 803.25, 1,203.13 and 391.52 is: 586.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.25 : 1,203.13 = 391.52 : x
  2. Step 2: Convert to fraction form
    803.25/1,203.13 = 391.52/x
  3. Step 3: Cross multiply
    803.25x = 1,203.13 × 391.52
  4. Step 4: Simplify right side
    803.25x = 471,049.46
  5. Step 5: Solve for x
    x = 471,049.46/803.25
  6. Step 6: Final answer
    x = 586.43

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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.