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Finding the Fourth Proportional to 3,613.60, 4,987.20 and 2,042.20

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Solution

The fourth proportional to 3,613.60, 4,987.20 and 2,042.20 is: 2,818.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,613.60 : 4,987.20 = 2,042.20 : x
  2. Step 2: Convert to fraction form
    3,613.60/4,987.20 = 2,042.20/x
  3. Step 3: Cross multiply
    3,613.60x = 4,987.20 × 2,042.20
  4. Step 4: Simplify right side
    3,613.60x = 10,184,859.84
  5. Step 5: Solve for x
    x = 10,184,859.84/3,613.60
  6. Step 6: Final answer
    x = 2,818.48

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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.