Home / 2,130.78-3,197.13-1,155.42

Finding the Fourth Proportional to 2,130.78, 3,197.13 and 1,155.42

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Solution

The fourth proportional to 2,130.78, 3,197.13 and 1,155.42 is: 1,733.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.78 : 3,197.13 = 1,155.42 : x
  2. Step 2: Convert to fraction form
    2,130.78/3,197.13 = 1,155.42/x
  3. Step 3: Cross multiply
    2,130.78x = 3,197.13 × 1,155.42
  4. Step 4: Simplify right side
    2,130.78x = 3,694,027.94
  5. Step 5: Solve for x
    x = 3,694,027.94/2,130.78
  6. Step 6: Final answer
    x = 1,733.65

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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.