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Finding the Fourth Proportional to 747.37, 1,119.22 and 515.61

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Solution

The fourth proportional to 747.37, 1,119.22 and 515.61 is: 772.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    747.37 : 1,119.22 = 515.61 : x
  2. Step 2: Convert to fraction form
    747.37/1,119.22 = 515.61/x
  3. Step 3: Cross multiply
    747.37x = 1,119.22 × 515.61
  4. Step 4: Simplify right side
    747.37x = 577,081.02
  5. Step 5: Solve for x
    x = 577,081.02/747.37
  6. Step 6: Final answer
    x = 772.15

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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.