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Finding the Fourth Proportional to 2,640.31, 3,642.03 and 1,695.78

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Solution

The fourth proportional to 2,640.31, 3,642.03 and 1,695.78 is: 2,339.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640.31 : 3,642.03 = 1,695.78 : x
  2. Step 2: Convert to fraction form
    2,640.31/3,642.03 = 1,695.78/x
  3. Step 3: Cross multiply
    2,640.31x = 3,642.03 × 1,695.78
  4. Step 4: Simplify right side
    2,640.31x = 6,176,081.63
  5. Step 5: Solve for x
    x = 6,176,081.63/2,640.31
  6. Step 6: Final answer
    x = 2,339.15

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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.