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Finding the Fourth Proportional to 3,687.92, 5,090.40 and 2,429.90

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Solution

The fourth proportional to 3,687.92, 5,090.40 and 2,429.90 is: 3,353.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,687.92 : 5,090.40 = 2,429.90 : x
  2. Step 2: Convert to fraction form
    3,687.92/5,090.40 = 2,429.90/x
  3. Step 3: Cross multiply
    3,687.92x = 5,090.40 × 2,429.90
  4. Step 4: Simplify right side
    3,687.92x = 12,369,162.96
  5. Step 5: Solve for x
    x = 12,369,162.96/3,687.92
  6. Step 6: Final answer
    x = 3,353.97

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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.