Home / 2,315.64-3,195.56-1,320.92

Finding the Fourth Proportional to 2,315.64, 3,195.56 and 1,320.92

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Solution

The fourth proportional to 2,315.64, 3,195.56 and 1,320.92 is: 1,822.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,315.64 : 3,195.56 = 1,320.92 : x
  2. Step 2: Convert to fraction form
    2,315.64/3,195.56 = 1,320.92/x
  3. Step 3: Cross multiply
    2,315.64x = 3,195.56 × 1,320.92
  4. Step 4: Simplify right side
    2,315.64x = 4,221,079.12
  5. Step 5: Solve for x
    x = 4,221,079.12/2,315.64
  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.