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Finding the Fourth Proportional to 1,964.88, 2,711.28 and 1,256.92

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Solution

The fourth proportional to 1,964.88, 2,711.28 and 1,256.92 is: 1,734.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,964.88 : 2,711.28 = 1,256.92 : x
  2. Step 2: Convert to fraction form
    1,964.88/2,711.28 = 1,256.92/x
  3. Step 3: Cross multiply
    1,964.88x = 2,711.28 × 1,256.92
  4. Step 4: Simplify right side
    1,964.88x = 3,407,862.06
  5. Step 5: Solve for x
    x = 3,407,862.06/1,964.88
  6. Step 6: Final answer
    x = 1,734.39

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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.