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Finding the Fourth Proportional to 1,358.90, 1,874.96 and 799.39

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Solution

The fourth proportional to 1,358.90, 1,874.96 and 799.39 is: 1,102.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,358.90 : 1,874.96 = 799.39 : x
  2. Step 2: Convert to fraction form
    1,358.90/1,874.96 = 799.39/x
  3. Step 3: Cross multiply
    1,358.90x = 1,874.96 × 799.39
  4. Step 4: Simplify right side
    1,358.90x = 1,498,825.62
  5. Step 5: Solve for x
    x = 1,498,825.62/1,358.90
  6. Step 6: Final answer
    x = 1,102.97

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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.