Home / 2,225.28-3,315.36-2,115.12

Finding the Fourth Proportional to 2,225.28, 3,315.36 and 2,115.12

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Solution

The fourth proportional to 2,225.28, 3,315.36 and 2,115.12 is: 3,151.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,225.28 : 3,315.36 = 2,115.12 : x
  2. Step 2: Convert to fraction form
    2,225.28/3,315.36 = 2,115.12/x
  3. Step 3: Cross multiply
    2,225.28x = 3,315.36 × 2,115.12
  4. Step 4: Simplify right side
    2,225.28x = 7,012,384.24
  5. Step 5: Solve for x
    x = 7,012,384.24/2,225.28
  6. Step 6: Final answer
    x = 3,151.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.