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Finding the Fourth Proportional to 2,320.32, 3,480.84 and 759.84

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Solution

The fourth proportional to 2,320.32, 3,480.84 and 759.84 is: 1,139.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,320.32 : 3,480.84 = 759.84 : x
  2. Step 2: Convert to fraction form
    2,320.32/3,480.84 = 759.84/x
  3. Step 3: Cross multiply
    2,320.32x = 3,480.84 × 759.84
  4. Step 4: Simplify right side
    2,320.32x = 2,644,881.47
  5. Step 5: Solve for x
    x = 2,644,881.47/2,320.32
  6. Step 6: Final answer
    x = 1,139.88

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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.