Home / 2,159.28-2,980.04-1,275.39

Finding the Fourth Proportional to 2,159.28, 2,980.04 and 1,275.39

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Solution

The fourth proportional to 2,159.28, 2,980.04 and 1,275.39 is: 1,760.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.28 : 2,980.04 = 1,275.39 : x
  2. Step 2: Convert to fraction form
    2,159.28/2,980.04 = 1,275.39/x
  3. Step 3: Cross multiply
    2,159.28x = 2,980.04 × 1,275.39
  4. Step 4: Simplify right side
    2,159.28x = 3,800,706.84
  5. Step 5: Solve for x
    x = 3,800,706.84/2,159.28
  6. Step 6: Final answer
    x = 1,760.17

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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.