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Finding the Fourth Proportional to 816.04, 1,224.21 and 487.55

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Solution

The fourth proportional to 816.04, 1,224.21 and 487.55 is: 731.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.04 : 1,224.21 = 487.55 : x
  2. Step 2: Convert to fraction form
    816.04/1,224.21 = 487.55/x
  3. Step 3: Cross multiply
    816.04x = 1,224.21 × 487.55
  4. Step 4: Simplify right side
    816.04x = 596,868.47
  5. Step 5: Solve for x
    x = 596,868.47/816.04
  6. Step 6: Final answer
    x = 731.42

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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.