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Finding the Fourth Proportional to 754.03, 1,125.05 and 661.69

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Solution

The fourth proportional to 754.03, 1,125.05 and 661.69 is: 987.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.03 : 1,125.05 = 661.69 : x
  2. Step 2: Convert to fraction form
    754.03/1,125.05 = 661.69/x
  3. Step 3: Cross multiply
    754.03x = 1,125.05 × 661.69
  4. Step 4: Simplify right side
    754.03x = 744,434.33
  5. Step 5: Solve for x
    x = 744,434.33/754.03
  6. Step 6: Final answer
    x = 987.27

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.