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Finding the Fourth Proportional to 888.80, 1,225.12 and 749.12

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Solution

The fourth proportional to 888.80, 1,225.12 and 749.12 is: 1,032.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.80 : 1,225.12 = 749.12 : x
  2. Step 2: Convert to fraction form
    888.80/1,225.12 = 749.12/x
  3. Step 3: Cross multiply
    888.80x = 1,225.12 × 749.12
  4. Step 4: Simplify right side
    888.80x = 917,761.89
  5. Step 5: Solve for x
    x = 917,761.89/888.80
  6. Step 6: Final answer
    x = 1,032.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.