Home / 1,126.89-1,690.19-396.38

Finding the Fourth Proportional to 1,126.89, 1,690.19 and 396.38

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Solution

The fourth proportional to 1,126.89, 1,690.19 and 396.38 is: 594.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.89 : 1,690.19 = 396.38 : x
  2. Step 2: Convert to fraction form
    1,126.89/1,690.19 = 396.38/x
  3. Step 3: Cross multiply
    1,126.89x = 1,690.19 × 396.38
  4. Step 4: Simplify right side
    1,126.89x = 669,947.08
  5. Step 5: Solve for x
    x = 669,947.08/1,126.89
  6. Step 6: Final answer
    x = 594.51

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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.