Home / 1,979.79-2,966.85-1,112.28

Finding the Fourth Proportional to 1,979.79, 2,966.85 and 1,112.28

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Solution

The fourth proportional to 1,979.79, 2,966.85 and 1,112.28 is: 1,666.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.79 : 2,966.85 = 1,112.28 : x
  2. Step 2: Convert to fraction form
    1,979.79/2,966.85 = 1,112.28/x
  3. Step 3: Cross multiply
    1,979.79x = 2,966.85 × 1,112.28
  4. Step 4: Simplify right side
    1,979.79x = 3,299,967.92
  5. Step 5: Solve for x
    x = 3,299,967.92/1,979.79
  6. Step 6: Final answer
    x = 1,666.83

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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.