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Finding the Fourth Proportional to 858.52, 1,281.56 and 754.73

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Solution

The fourth proportional to 858.52, 1,281.56 and 754.73 is: 1,126.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    858.52 : 1,281.56 = 754.73 : x
  2. Step 2: Convert to fraction form
    858.52/1,281.56 = 754.73/x
  3. Step 3: Cross multiply
    858.52x = 1,281.56 × 754.73
  4. Step 4: Simplify right side
    858.52x = 967,221.60
  5. Step 5: Solve for x
    x = 967,221.60/858.52
  6. Step 6: Final answer
    x = 1,126.62

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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.