Home / 2,159.30-2,979.68-1,214.79

Finding the Fourth Proportional to 2,159.30, 2,979.68 and 1,214.79

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Solution

The fourth proportional to 2,159.30, 2,979.68 and 1,214.79 is: 1,676.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.30 : 2,979.68 = 1,214.79 : x
  2. Step 2: Convert to fraction form
    2,159.30/2,979.68 = 1,214.79/x
  3. Step 3: Cross multiply
    2,159.30x = 2,979.68 × 1,214.79
  4. Step 4: Simplify right side
    2,159.30x = 3,619,679.39
  5. Step 5: Solve for x
    x = 3,619,679.39/2,159.30
  6. Step 6: Final answer
    x = 1,676.32

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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.