Home / 2,340.90-3,231.18-1,397.39

Finding the Fourth Proportional to 2,340.90, 3,231.18 and 1,397.39

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Solution

The fourth proportional to 2,340.90, 3,231.18 and 1,397.39 is: 1,928.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,340.90 : 3,231.18 = 1,397.39 : x
  2. Step 2: Convert to fraction form
    2,340.90/3,231.18 = 1,397.39/x
  3. Step 3: Cross multiply
    2,340.90x = 3,231.18 × 1,397.39
  4. Step 4: Simplify right side
    2,340.90x = 4,515,202.46
  5. Step 5: Solve for x
    x = 4,515,202.46/2,340.90
  6. Step 6: Final answer
    x = 1,928.83

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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.