Home / 1,758.52-2,639.28-979.30

Finding the Fourth Proportional to 1,758.52, 2,639.28 and 979.30

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Solution

The fourth proportional to 1,758.52, 2,639.28 and 979.30 is: 1,469.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,758.52 : 2,639.28 = 979.30 : x
  2. Step 2: Convert to fraction form
    1,758.52/2,639.28 = 979.30/x
  3. Step 3: Cross multiply
    1,758.52x = 2,639.28 × 979.30
  4. Step 4: Simplify right side
    1,758.52x = 2,584,646.90
  5. Step 5: Solve for x
    x = 2,584,646.90/1,758.52
  6. Step 6: Final answer
    x = 1,469.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.