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Finding the Fourth Proportional to 866.28, 1,293.09 and 751.53

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Solution

The fourth proportional to 866.28, 1,293.09 and 751.53 is: 1,121.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.28 : 1,293.09 = 751.53 : x
  2. Step 2: Convert to fraction form
    866.28/1,293.09 = 751.53/x
  3. Step 3: Cross multiply
    866.28x = 1,293.09 × 751.53
  4. Step 4: Simplify right side
    866.28x = 971,795.93
  5. Step 5: Solve for x
    x = 971,795.93/866.28
  6. Step 6: Final answer
    x = 1,121.80

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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.