Home / 1,422.40-2,131.62-901.48

Finding the Fourth Proportional to 1,422.40, 2,131.62 and 901.48

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Solution

The fourth proportional to 1,422.40, 2,131.62 and 901.48 is: 1,350.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.40 : 2,131.62 = 901.48 : x
  2. Step 2: Convert to fraction form
    1,422.40/2,131.62 = 901.48/x
  3. Step 3: Cross multiply
    1,422.40x = 2,131.62 × 901.48
  4. Step 4: Simplify right side
    1,422.40x = 1,921,612.80
  5. Step 5: Solve for x
    x = 1,921,612.80/1,422.40
  6. Step 6: Final answer
    x = 1,350.97

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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.