Home / 1,631.24-2,251.12-885.20

Finding the Fourth Proportional to 1,631.24, 2,251.12 and 885.20

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Solution

The fourth proportional to 1,631.24, 2,251.12 and 885.20 is: 1,221.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,631.24 : 2,251.12 = 885.20 : x
  2. Step 2: Convert to fraction form
    1,631.24/2,251.12 = 885.20/x
  3. Step 3: Cross multiply
    1,631.24x = 2,251.12 × 885.20
  4. Step 4: Simplify right side
    1,631.24x = 1,992,692.28
  5. Step 5: Solve for x
    x = 1,992,692.28/1,631.24
  6. Step 6: Final answer
    x = 1,221.58

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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.