Home / 2,651.52-3,977.28-1,189.20

Finding the Fourth Proportional to 2,651.52, 3,977.28 and 1,189.20

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Solution

The fourth proportional to 2,651.52, 3,977.28 and 1,189.20 is: 1,783.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,651.52 : 3,977.28 = 1,189.20 : x
  2. Step 2: Convert to fraction form
    2,651.52/3,977.28 = 1,189.20/x
  3. Step 3: Cross multiply
    2,651.52x = 3,977.28 × 1,189.20
  4. Step 4: Simplify right side
    2,651.52x = 4,729,781.38
  5. Step 5: Solve for x
    x = 4,729,781.38/2,651.52
  6. Step 6: Final answer
    x = 1,783.80

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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.