Home / 2,175.12-3,001.29-1,278.90

Finding the Fourth Proportional to 2,175.12, 3,001.29 and 1,278.90

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Solution

The fourth proportional to 2,175.12, 3,001.29 and 1,278.90 is: 1,764.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,175.12 : 3,001.29 = 1,278.90 : x
  2. Step 2: Convert to fraction form
    2,175.12/3,001.29 = 1,278.90/x
  3. Step 3: Cross multiply
    2,175.12x = 3,001.29 × 1,278.90
  4. Step 4: Simplify right side
    2,175.12x = 3,838,349.78
  5. Step 5: Solve for x
    x = 3,838,349.78/2,175.12
  6. Step 6: Final answer
    x = 1,764.66

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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.