Home / 1,422.96-2,129.04-1,279.08

Finding the Fourth Proportional to 1,422.96, 2,129.04 and 1,279.08

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Solution

The fourth proportional to 1,422.96, 2,129.04 and 1,279.08 is: 1,913.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.96 : 2,129.04 = 1,279.08 : x
  2. Step 2: Convert to fraction form
    1,422.96/2,129.04 = 1,279.08/x
  3. Step 3: Cross multiply
    1,422.96x = 2,129.04 × 1,279.08
  4. Step 4: Simplify right side
    1,422.96x = 2,723,212.48
  5. Step 5: Solve for x
    x = 2,723,212.48/1,422.96
  6. Step 6: Final answer
    x = 1,913.77

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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.