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Finding the Fourth Proportional to 3,902.62, 5,386.22 and 2,486.92

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Solution

The fourth proportional to 3,902.62, 5,386.22 and 2,486.92 is: 3,432.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,902.62 : 5,386.22 = 2,486.92 : x
  2. Step 2: Convert to fraction form
    3,902.62/5,386.22 = 2,486.92/x
  3. Step 3: Cross multiply
    3,902.62x = 5,386.22 × 2,486.92
  4. Step 4: Simplify right side
    3,902.62x = 13,395,098.24
  5. Step 5: Solve for x
    x = 13,395,098.24/3,902.62
  6. Step 6: Final answer
    x = 3,432.33

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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.