Home / 3,687.40-5,090.34-2,640.04

Finding the Fourth Proportional to 3,687.40, 5,090.34 and 2,640.04

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Solution

The fourth proportional to 3,687.40, 5,090.34 and 2,640.04 is: 3,644.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,687.40 : 5,090.34 = 2,640.04 : x
  2. Step 2: Convert to fraction form
    3,687.40/5,090.34 = 2,640.04/x
  3. Step 3: Cross multiply
    3,687.40x = 5,090.34 × 2,640.04
  4. Step 4: Simplify right side
    3,687.40x = 13,438,701.21
  5. Step 5: Solve for x
    x = 13,438,701.21/3,687.40
  6. Step 6: Final answer
    x = 3,644.49

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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.