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Finding the Fourth Proportional to 747.01, 1,119.72 and 487.21

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Solution

The fourth proportional to 747.01, 1,119.72 and 487.21 is: 730.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    747.01 : 1,119.72 = 487.21 : x
  2. Step 2: Convert to fraction form
    747.01/1,119.72 = 487.21/x
  3. Step 3: Cross multiply
    747.01x = 1,119.72 × 487.21
  4. Step 4: Simplify right side
    747.01x = 545,538.78
  5. Step 5: Solve for x
    x = 545,538.78/747.01
  6. Step 6: Final answer
    x = 730.30

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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.