Home / 2,315.38-3,195.30-1,320.88

Finding the Fourth Proportional to 2,315.38, 3,195.30 and 1,320.88

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Solution

The fourth proportional to 2,315.38, 3,195.30 and 1,320.88 is: 1,822.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,315.38 : 3,195.30 = 1,320.88 : x
  2. Step 2: Convert to fraction form
    2,315.38/3,195.30 = 1,320.88/x
  3. Step 3: Cross multiply
    2,315.38x = 3,195.30 × 1,320.88
  4. Step 4: Simplify right side
    2,315.38x = 4,220,607.86
  5. Step 5: Solve for x
    x = 4,220,607.86/2,315.38
  6. Step 6: Final answer
    x = 1,822.86

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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.