Home / 2,342.40-3,231.20-1,397.92

Finding the Fourth Proportional to 2,342.40, 3,231.20 and 1,397.92

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Solution

The fourth proportional to 2,342.40, 3,231.20 and 1,397.92 is: 1,928.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,342.40 : 3,231.20 = 1,397.92 : x
  2. Step 2: Convert to fraction form
    2,342.40/3,231.20 = 1,397.92/x
  3. Step 3: Cross multiply
    2,342.40x = 3,231.20 × 1,397.92
  4. Step 4: Simplify right side
    2,342.40x = 4,516,959.10
  5. Step 5: Solve for x
    x = 4,516,959.10/2,342.40
  6. Step 6: Final answer
    x = 1,928.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.