Home / 1,425.38-2,135.30-807.18

Finding the Fourth Proportional to 1,425.38, 2,135.30 and 807.18

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Solution

The fourth proportional to 1,425.38, 2,135.30 and 807.18 is: 1,209.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.38 : 2,135.30 = 807.18 : x
  2. Step 2: Convert to fraction form
    1,425.38/2,135.30 = 807.18/x
  3. Step 3: Cross multiply
    1,425.38x = 2,135.30 × 807.18
  4. Step 4: Simplify right side
    1,425.38x = 1,723,571.45
  5. Step 5: Solve for x
    x = 1,723,571.45/1,425.38
  6. Step 6: Final answer
    x = 1,209.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.