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Finding the Fourth Proportional to 1,959.68, 2,705.12 and 1,329.88

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Solution

The fourth proportional to 1,959.68, 2,705.12 and 1,329.88 is: 1,835.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,959.68 : 2,705.12 = 1,329.88 : x
  2. Step 2: Convert to fraction form
    1,959.68/2,705.12 = 1,329.88/x
  3. Step 3: Cross multiply
    1,959.68x = 2,705.12 × 1,329.88
  4. Step 4: Simplify right side
    1,959.68x = 3,597,484.99
  5. Step 5: Solve for x
    x = 3,597,484.99/1,959.68
  6. Step 6: Final answer
    x = 1,835.75

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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.