Home / 1,979.12-2,731.11-1,094.78

Finding the Fourth Proportional to 1,979.12, 2,731.11 and 1,094.78

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Solution

The fourth proportional to 1,979.12, 2,731.11 and 1,094.78 is: 1,510.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.12 : 2,731.11 = 1,094.78 : x
  2. Step 2: Convert to fraction form
    1,979.12/2,731.11 = 1,094.78/x
  3. Step 3: Cross multiply
    1,979.12x = 2,731.11 × 1,094.78
  4. Step 4: Simplify right side
    1,979.12x = 2,989,964.61
  5. Step 5: Solve for x
    x = 2,989,964.61/1,979.12
  6. Step 6: Final answer
    x = 1,510.75

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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.