Home / 1,447.97-2,174.90-1,278.47

Finding the Fourth Proportional to 1,447.97, 2,174.90 and 1,278.47

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Solution

The fourth proportional to 1,447.97, 2,174.90 and 1,278.47 is: 1,920.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,447.97 : 2,174.90 = 1,278.47 : x
  2. Step 2: Convert to fraction form
    1,447.97/2,174.90 = 1,278.47/x
  3. Step 3: Cross multiply
    1,447.97x = 2,174.90 × 1,278.47
  4. Step 4: Simplify right side
    1,447.97x = 2,780,543.45
  5. Step 5: Solve for x
    x = 2,780,543.45/1,447.97
  6. Step 6: Final answer
    x = 1,920.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.