Home / 1,426.25-2,139.38-400.25

Finding the Fourth Proportional to 1,426.25, 2,139.38 and 400.25

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Solution

The fourth proportional to 1,426.25, 2,139.38 and 400.25 is: 600.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.25 : 2,139.38 = 400.25 : x
  2. Step 2: Convert to fraction form
    1,426.25/2,139.38 = 400.25/x
  3. Step 3: Cross multiply
    1,426.25x = 2,139.38 × 400.25
  4. Step 4: Simplify right side
    1,426.25x = 856,286.85
  5. Step 5: Solve for x
    x = 856,286.85/1,426.25
  6. Step 6: Final answer
    x = 600.38

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Half scale
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Double scale
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Similar ratio
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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.