Home / 2,315.38-3,195.09-1,320.66

Finding the Fourth Proportional to 2,315.38, 3,195.09 and 1,320.66

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Solution

The fourth proportional to 2,315.38, 3,195.09 and 1,320.66 is: 1,822.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,315.38 : 3,195.09 = 1,320.66 : x
  2. Step 2: Convert to fraction form
    2,315.38/3,195.09 = 1,320.66/x
  3. Step 3: Cross multiply
    2,315.38x = 3,195.09 × 1,320.66
  4. Step 4: Simplify right side
    2,315.38x = 4,219,627.56
  5. Step 5: Solve for x
    x = 4,219,627.56/2,315.38
  6. Step 6: Final answer
    x = 1,822.43

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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.