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Finding the Fourth Proportional to 2,691.70, 3,714.52 and 1,643.75

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Solution

The fourth proportional to 2,691.70, 3,714.52 and 1,643.75 is: 2,268.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,691.70 : 3,714.52 = 1,643.75 : x
  2. Step 2: Convert to fraction form
    2,691.70/3,714.52 = 1,643.75/x
  3. Step 3: Cross multiply
    2,691.70x = 3,714.52 × 1,643.75
  4. Step 4: Simplify right side
    2,691.70x = 6,105,742.25
  5. Step 5: Solve for x
    x = 6,105,742.25/2,691.70
  6. Step 6: Final answer
    x = 2,268.36

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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.