Home / 1,380.11-2,060.10-1,278.59

Finding the Fourth Proportional to 1,380.11, 2,060.10 and 1,278.59

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Solution

The fourth proportional to 1,380.11, 2,060.10 and 1,278.59 is: 1,908.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380.11 : 2,060.10 = 1,278.59 : x
  2. Step 2: Convert to fraction form
    1,380.11/2,060.10 = 1,278.59/x
  3. Step 3: Cross multiply
    1,380.11x = 2,060.10 × 1,278.59
  4. Step 4: Simplify right side
    1,380.11x = 2,634,012.96
  5. Step 5: Solve for x
    x = 2,634,012.96/1,380.11
  6. Step 6: Final answer
    x = 1,908.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.