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Finding the Fourth Proportional to 2,231.76, 3,080.13 and 1,347.78

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Solution

The fourth proportional to 2,231.76, 3,080.13 and 1,347.78 is: 1,860.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,231.76 : 3,080.13 = 1,347.78 : x
  2. Step 2: Convert to fraction form
    2,231.76/3,080.13 = 1,347.78/x
  3. Step 3: Cross multiply
    2,231.76x = 3,080.13 × 1,347.78
  4. Step 4: Simplify right side
    2,231.76x = 4,151,337.61
  5. Step 5: Solve for x
    x = 4,151,337.61/2,231.76
  6. Step 6: Final answer
    x = 1,860.12

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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.