Home / 1,979.64-2,731.68-1,233.72

Finding the Fourth Proportional to 1,979.64, 2,731.68 and 1,233.72

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Solution

The fourth proportional to 1,979.64, 2,731.68 and 1,233.72 is: 1,702.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.64 : 2,731.68 = 1,233.72 : x
  2. Step 2: Convert to fraction form
    1,979.64/2,731.68 = 1,233.72/x
  3. Step 3: Cross multiply
    1,979.64x = 2,731.68 × 1,233.72
  4. Step 4: Simplify right side
    1,979.64x = 3,370,128.25
  5. Step 5: Solve for x
    x = 3,370,128.25/1,979.64
  6. Step 6: Final answer
    x = 1,702.39

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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.