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Finding the Fourth Proportional to 3,648.48, 5,472.72 and 912.48

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Solution

The fourth proportional to 3,648.48, 5,472.72 and 912.48 is: 1,368.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,648.48 : 5,472.72 = 912.48 : x
  2. Step 2: Convert to fraction form
    3,648.48/5,472.72 = 912.48/x
  3. Step 3: Cross multiply
    3,648.48x = 5,472.72 × 912.48
  4. Step 4: Simplify right side
    3,648.48x = 4,993,747.55
  5. Step 5: Solve for x
    x = 4,993,747.55/3,648.48
  6. Step 6: Final answer
    x = 1,368.72

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Similar ratio
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1.5x scale

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.