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Finding the Fourth Proportional to 632.40, 949.20 and 495.60

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Solution

The fourth proportional to 632.40, 949.20 and 495.60 is: 743.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.40 : 949.20 = 495.60 : x
  2. Step 2: Convert to fraction form
    632.40/949.20 = 495.60/x
  3. Step 3: Cross multiply
    632.40x = 949.20 × 495.60
  4. Step 4: Simplify right side
    632.40x = 470,423.52
  5. Step 5: Solve for x
    x = 470,423.52/632.40
  6. Step 6: Final answer
    x = 743.87

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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.