Home / 2,638.60-3,640.22-2,428.79

Finding the Fourth Proportional to 2,638.60, 3,640.22 and 2,428.79

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Solution

The fourth proportional to 2,638.60, 3,640.22 and 2,428.79 is: 3,350.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,638.60 : 3,640.22 = 2,428.79 : x
  2. Step 2: Convert to fraction form
    2,638.60/3,640.22 = 2,428.79/x
  3. Step 3: Cross multiply
    2,638.60x = 3,640.22 × 2,428.79
  4. Step 4: Simplify right side
    2,638.60x = 8,841,301.87
  5. Step 5: Solve for x
    x = 8,841,301.87/2,638.60
  6. Step 6: Final answer
    x = 3,350.75

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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.