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Finding the Fourth Proportional to 674.28, 1,010.93 and 284.27

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Solution

The fourth proportional to 674.28, 1,010.93 and 284.27 is: 426.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.28 : 1,010.93 = 284.27 : x
  2. Step 2: Convert to fraction form
    674.28/1,010.93 = 284.27/x
  3. Step 3: Cross multiply
    674.28x = 1,010.93 × 284.27
  4. Step 4: Simplify right side
    674.28x = 287,370.60
  5. Step 5: Solve for x
    x = 287,370.60/674.28
  6. Step 6: Final answer
    x = 426.19

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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.