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Finding the Fourth Proportional to 1,331.62, 1,995.79 and 551.14

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Solution

The fourth proportional to 1,331.62, 1,995.79 and 551.14 is: 826.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.62 : 1,995.79 = 551.14 : x
  2. Step 2: Convert to fraction form
    1,331.62/1,995.79 = 551.14/x
  3. Step 3: Cross multiply
    1,331.62x = 1,995.79 × 551.14
  4. Step 4: Simplify right side
    1,331.62x = 1,099,959.70
  5. Step 5: Solve for x
    x = 1,099,959.70/1,331.62
  6. Step 6: Final answer
    x = 826.03

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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.