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Finding the Fourth Proportional to 2,617.47, 3,926.21 and 887.31

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Solution

The fourth proportional to 2,617.47, 3,926.21 and 887.31 is: 1,330.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,617.47 : 3,926.21 = 887.31 : x
  2. Step 2: Convert to fraction form
    2,617.47/3,926.21 = 887.31/x
  3. Step 3: Cross multiply
    2,617.47x = 3,926.21 × 887.31
  4. Step 4: Simplify right side
    2,617.47x = 3,483,760.96
  5. Step 5: Solve for x
    x = 3,483,760.96/2,617.47
  6. Step 6: Final answer
    x = 1,330.97

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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.