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Finding the Fourth Proportional to 747.59, 1,121.01 and 439.54

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Solution

The fourth proportional to 747.59, 1,121.01 and 439.54 is: 659.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    747.59 : 1,121.01 = 439.54 : x
  2. Step 2: Convert to fraction form
    747.59/1,121.01 = 439.54/x
  3. Step 3: Cross multiply
    747.59x = 1,121.01 × 439.54
  4. Step 4: Simplify right side
    747.59x = 492,724.28
  5. Step 5: Solve for x
    x = 492,724.28/747.59
  6. Step 6: Final answer
    x = 659.08

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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.