Home / 2,342.21-3,231.78-1,397.70

Finding the Fourth Proportional to 2,342.21, 3,231.78 and 1,397.70

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Solution

The fourth proportional to 2,342.21, 3,231.78 and 1,397.70 is: 1,928.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,342.21 : 3,231.78 = 1,397.70 : x
  2. Step 2: Convert to fraction form
    2,342.21/3,231.78 = 1,397.70/x
  3. Step 3: Cross multiply
    2,342.21x = 3,231.78 × 1,397.70
  4. Step 4: Simplify right side
    2,342.21x = 4,517,064.72
  5. Step 5: Solve for x
    x = 4,517,064.72/2,342.21
  6. Step 6: Final answer
    x = 1,928.55

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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.