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Finding the Fourth Proportional to 1,320.96, 1,982.82 and 591.14

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Solution

The fourth proportional to 1,320.96, 1,982.82 and 591.14 is: 887.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.96 : 1,982.82 = 591.14 : x
  2. Step 2: Convert to fraction form
    1,320.96/1,982.82 = 591.14/x
  3. Step 3: Cross multiply
    1,320.96x = 1,982.82 × 591.14
  4. Step 4: Simplify right side
    1,320.96x = 1,172,124.21
  5. Step 5: Solve for x
    x = 1,172,124.21/1,320.96
  6. Step 6: Final answer
    x = 887.33

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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.