Home / 2,315.60-3,195.56-1,320.80

Finding the Fourth Proportional to 2,315.60, 3,195.56 and 1,320.80

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Solution

The fourth proportional to 2,315.60, 3,195.56 and 1,320.80 is: 1,822.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,315.60 : 3,195.56 = 1,320.80 : x
  2. Step 2: Convert to fraction form
    2,315.60/3,195.56 = 1,320.80/x
  3. Step 3: Cross multiply
    2,315.60x = 3,195.56 × 1,320.80
  4. Step 4: Simplify right side
    2,315.60x = 4,220,695.65
  5. Step 5: Solve for x
    x = 4,220,695.65/2,315.60
  6. Step 6: Final answer
    x = 1,822.72

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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.