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Finding the Fourth Proportional to 749.03, 1,122.97 and 618.62

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Solution

The fourth proportional to 749.03, 1,122.97 and 618.62 is: 927.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.03 : 1,122.97 = 618.62 : x
  2. Step 2: Convert to fraction form
    749.03/1,122.97 = 618.62/x
  3. Step 3: Cross multiply
    749.03x = 1,122.97 × 618.62
  4. Step 4: Simplify right side
    749.03x = 694,687.35
  5. Step 5: Solve for x
    x = 694,687.35/749.03
  6. Step 6: Final answer
    x = 927.45

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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.