Home / 2,275.40-3,138.36-1,343.90

Finding the Fourth Proportional to 2,275.40, 3,138.36 and 1,343.90

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Solution

The fourth proportional to 2,275.40, 3,138.36 and 1,343.90 is: 1,853.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,275.40 : 3,138.36 = 1,343.90 : x
  2. Step 2: Convert to fraction form
    2,275.40/3,138.36 = 1,343.90/x
  3. Step 3: Cross multiply
    2,275.40x = 3,138.36 × 1,343.90
  4. Step 4: Simplify right side
    2,275.40x = 4,217,642.00
  5. Step 5: Solve for x
    x = 4,217,642.00/2,275.40
  6. Step 6: Final answer
    x = 1,853.58

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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.