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Finding the Fourth Proportional to 3,613.78, 4,991.12 and 2,432.80

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Solution

The fourth proportional to 3,613.78, 4,991.12 and 2,432.80 is: 3,360.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,613.78 : 4,991.12 = 2,432.80 : x
  2. Step 2: Convert to fraction form
    3,613.78/4,991.12 = 2,432.80/x
  3. Step 3: Cross multiply
    3,613.78x = 4,991.12 × 2,432.80
  4. Step 4: Simplify right side
    3,613.78x = 12,142,399.93
  5. Step 5: Solve for x
    x = 12,142,399.93/3,613.78
  6. Step 6: Final answer
    x = 3,360.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.