Home / 2,315.12-3,195.32-1,320.30

Finding the Fourth Proportional to 2,315.12, 3,195.32 and 1,320.30

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Solution

The fourth proportional to 2,315.12, 3,195.32 and 1,320.30 is: 1,822.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,315.12 : 3,195.32 = 1,320.30 : x
  2. Step 2: Convert to fraction form
    2,315.12/3,195.32 = 1,320.30/x
  3. Step 3: Cross multiply
    2,315.12x = 3,195.32 × 1,320.30
  4. Step 4: Simplify right side
    2,315.12x = 4,218,774.39
  5. Step 5: Solve for x
    x = 4,218,774.39/2,315.12
  6. Step 6: Final answer
    x = 1,822.27

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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.