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Finding the Fourth Proportional to 2,640.16, 3,640.11 and 1,694.28

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Solution

The fourth proportional to 2,640.16, 3,640.11 and 1,694.28 is: 2,335.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640.16 : 3,640.11 = 1,694.28 : x
  2. Step 2: Convert to fraction form
    2,640.16/3,640.11 = 1,694.28/x
  3. Step 3: Cross multiply
    2,640.16x = 3,640.11 × 1,694.28
  4. Step 4: Simplify right side
    2,640.16x = 6,167,387.16
  5. Step 5: Solve for x
    x = 6,167,387.16/2,640.16
  6. Step 6: Final answer
    x = 2,335.99

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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.