Home / 2,159.20-2,979.84-1,227.76

Finding the Fourth Proportional to 2,159.20, 2,979.84 and 1,227.76

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Solution

The fourth proportional to 2,159.20, 2,979.84 and 1,227.76 is: 1,694.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.20 : 2,979.84 = 1,227.76 : x
  2. Step 2: Convert to fraction form
    2,159.20/2,979.84 = 1,227.76/x
  3. Step 3: Cross multiply
    2,159.20x = 2,979.84 × 1,227.76
  4. Step 4: Simplify right side
    2,159.20x = 3,658,528.36
  5. Step 5: Solve for x
    x = 3,658,528.36/2,159.20
  6. Step 6: Final answer
    x = 1,694.39

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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.