Home / 2,311.38-3,191.58-1,427.76

Finding the Fourth Proportional to 2,311.38, 3,191.58 and 1,427.76

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Solution

The fourth proportional to 2,311.38, 3,191.58 and 1,427.76 is: 1,971.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,311.38 : 3,191.58 = 1,427.76 : x
  2. Step 2: Convert to fraction form
    2,311.38/3,191.58 = 1,427.76/x
  3. Step 3: Cross multiply
    2,311.38x = 3,191.58 × 1,427.76
  4. Step 4: Simplify right side
    2,311.38x = 4,556,810.26
  5. Step 5: Solve for x
    x = 4,556,810.26/2,311.38
  6. Step 6: Final answer
    x = 1,971.47

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.