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Finding the Fourth Proportional to 747.20, 1,119.88 and 625.10

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Solution

The fourth proportional to 747.20, 1,119.88 and 625.10 is: 936.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    747.20 : 1,119.88 = 625.10 : x
  2. Step 2: Convert to fraction form
    747.20/1,119.88 = 625.10/x
  3. Step 3: Cross multiply
    747.20x = 1,119.88 × 625.10
  4. Step 4: Simplify right side
    747.20x = 700,029.83
  5. Step 5: Solve for x
    x = 700,029.83/747.20
  6. Step 6: Final answer
    x = 936.87

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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.