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Finding the Fourth Proportional to 2,640.16, 3,640.44 and 1,974.88

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Solution

The fourth proportional to 2,640.16, 3,640.44 and 1,974.88 is: 2,723.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640.16 : 3,640.44 = 1,974.88 : x
  2. Step 2: Convert to fraction form
    2,640.16/3,640.44 = 1,974.88/x
  3. Step 3: Cross multiply
    2,640.16x = 3,640.44 × 1,974.88
  4. Step 4: Simplify right side
    2,640.16x = 7,189,432.15
  5. Step 5: Solve for x
    x = 7,189,432.15/2,640.16
  6. Step 6: Final answer
    x = 2,723.10

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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.