Home / 1,979.10-2,963.79-1,392.66

Finding the Fourth Proportional to 1,979.10, 2,963.79 and 1,392.66

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Solution

The fourth proportional to 1,979.10, 2,963.79 and 1,392.66 is: 2,085.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.10 : 2,963.79 = 1,392.66 : x
  2. Step 2: Convert to fraction form
    1,979.10/2,963.79 = 1,392.66/x
  3. Step 3: Cross multiply
    1,979.10x = 2,963.79 × 1,392.66
  4. Step 4: Simplify right side
    1,979.10x = 4,127,551.78
  5. Step 5: Solve for x
    x = 4,127,551.78/1,979.10
  6. Step 6: Final answer
    x = 2,085.57

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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.