Home / 1,447.70-2,161.07-1,272.55

Finding the Fourth Proportional to 1,447.70, 2,161.07 and 1,272.55

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Solution

The fourth proportional to 1,447.70, 2,161.07 and 1,272.55 is: 1,899.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,447.70 : 2,161.07 = 1,272.55 : x
  2. Step 2: Convert to fraction form
    1,447.70/2,161.07 = 1,272.55/x
  3. Step 3: Cross multiply
    1,447.70x = 2,161.07 × 1,272.55
  4. Step 4: Simplify right side
    1,447.70x = 2,750,065.02
  5. Step 5: Solve for x
    x = 2,750,065.02/1,447.70
  6. Step 6: Final answer
    x = 1,899.61

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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.