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Finding the Fourth Proportional to 747.10, 1,120.45 and 624.49

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Solution

The fourth proportional to 747.10, 1,120.45 and 624.49 is: 936.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    747.10 : 1,120.45 = 624.49 : x
  2. Step 2: Convert to fraction form
    747.10/1,120.45 = 624.49/x
  3. Step 3: Cross multiply
    747.10x = 1,120.45 × 624.49
  4. Step 4: Simplify right side
    747.10x = 699,709.82
  5. Step 5: Solve for x
    x = 699,709.82/747.10
  6. Step 6: Final answer
    x = 936.57

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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.