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Finding the Fourth Proportional to 949.59, 1,424.79 and 487.49

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Solution

The fourth proportional to 949.59, 1,424.79 and 487.49 is: 731.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.59 : 1,424.79 = 487.49 : x
  2. Step 2: Convert to fraction form
    949.59/1,424.79 = 487.49/x
  3. Step 3: Cross multiply
    949.59x = 1,424.79 × 487.49
  4. Step 4: Simplify right side
    949.59x = 694,563.75
  5. Step 5: Solve for x
    x = 694,563.75/949.59
  6. Step 6: Final answer
    x = 731.44

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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.