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Finding the Fourth Proportional to 3,387.42, 5,081.13 and 1,308.42

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Solution

The fourth proportional to 3,387.42, 5,081.13 and 1,308.42 is: 1,962.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,387.42 : 5,081.13 = 1,308.42 : x
  2. Step 2: Convert to fraction form
    3,387.42/5,081.13 = 1,308.42/x
  3. Step 3: Cross multiply
    3,387.42x = 5,081.13 × 1,308.42
  4. Step 4: Simplify right side
    3,387.42x = 6,648,252.11
  5. Step 5: Solve for x
    x = 6,648,252.11/3,387.42
  6. Step 6: Final answer
    x = 1,962.63

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Double scale
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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.