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Finding the Fourth Proportional to 1,329.97, 1,995.28 and 579.61

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Solution

The fourth proportional to 1,329.97, 1,995.28 and 579.61 is: 869.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.97 : 1,995.28 = 579.61 : x
  2. Step 2: Convert to fraction form
    1,329.97/1,995.28 = 579.61/x
  3. Step 3: Cross multiply
    1,329.97x = 1,995.28 × 579.61
  4. Step 4: Simplify right side
    1,329.97x = 1,156,477.32
  5. Step 5: Solve for x
    x = 1,156,477.32/1,329.97
  6. Step 6: Final answer
    x = 869.55

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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.