Home / 2,159.20-2,979.70-1,214.96

Finding the Fourth Proportional to 2,159.20, 2,979.70 and 1,214.96

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Solution

The fourth proportional to 2,159.20, 2,979.70 and 1,214.96 is: 1,676.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.20 : 2,979.70 = 1,214.96 : x
  2. Step 2: Convert to fraction form
    2,159.20/2,979.70 = 1,214.96/x
  3. Step 3: Cross multiply
    2,159.20x = 2,979.70 × 1,214.96
  4. Step 4: Simplify right side
    2,159.20x = 3,620,216.31
  5. Step 5: Solve for x
    x = 3,620,216.31/2,159.20
  6. Step 6: Final answer
    x = 1,676.65

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1.5x scale

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.