Home / 2,159.28-2,979.27-1,275.12

Finding the Fourth Proportional to 2,159.28, 2,979.27 and 1,275.12

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Solution

The fourth proportional to 2,159.28, 2,979.27 and 1,275.12 is: 1,759.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.28 : 2,979.27 = 1,275.12 : x
  2. Step 2: Convert to fraction form
    2,159.28/2,979.27 = 1,275.12/x
  3. Step 3: Cross multiply
    2,159.28x = 2,979.27 × 1,275.12
  4. Step 4: Simplify right side
    2,159.28x = 3,798,926.76
  5. Step 5: Solve for x
    x = 3,798,926.76/2,159.28
  6. Step 6: Final answer
    x = 1,759.35

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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.