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Finding the Fourth Proportional to 669.25, 1,004.08 and 284.53

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Solution

The fourth proportional to 669.25, 1,004.08 and 284.53 is: 426.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.25 : 1,004.08 = 284.53 : x
  2. Step 2: Convert to fraction form
    669.25/1,004.08 = 284.53/x
  3. Step 3: Cross multiply
    669.25x = 1,004.08 × 284.53
  4. Step 4: Simplify right side
    669.25x = 285,689.46
  5. Step 5: Solve for x
    x = 285,689.46/669.25
  6. Step 6: Final answer
    x = 426.88

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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.