Home / 2,311.56-3,188.64-1,425.78

Finding the Fourth Proportional to 2,311.56, 3,188.64 and 1,425.78

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Solution

The fourth proportional to 2,311.56, 3,188.64 and 1,425.78 is: 1,966.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,311.56 : 3,188.64 = 1,425.78 : x
  2. Step 2: Convert to fraction form
    2,311.56/3,188.64 = 1,425.78/x
  3. Step 3: Cross multiply
    2,311.56x = 3,188.64 × 1,425.78
  4. Step 4: Simplify right side
    2,311.56x = 4,546,299.14
  5. Step 5: Solve for x
    x = 4,546,299.14/2,311.56
  6. Step 6: Final answer
    x = 1,966.77

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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.