Home / 3,126.75-4,690.12-1,178.49

Finding the Fourth Proportional to 3,126.75, 4,690.12 and 1,178.49

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Solution

The fourth proportional to 3,126.75, 4,690.12 and 1,178.49 is: 1,767.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126.75 : 4,690.12 = 1,178.49 : x
  2. Step 2: Convert to fraction form
    3,126.75/4,690.12 = 1,178.49/x
  3. Step 3: Cross multiply
    3,126.75x = 4,690.12 × 1,178.49
  4. Step 4: Simplify right side
    3,126.75x = 5,527,278.58
  5. Step 5: Solve for x
    x = 5,527,278.58/3,126.75
  6. Step 6: Final answer
    x = 1,767.74

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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.