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Finding the Fourth Proportional to 3,476.62, 5,215.11 and 879.58

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Solution

The fourth proportional to 3,476.62, 5,215.11 and 879.58 is: 1,319.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,476.62 : 5,215.11 = 879.58 : x
  2. Step 2: Convert to fraction form
    3,476.62/5,215.11 = 879.58/x
  3. Step 3: Cross multiply
    3,476.62x = 5,215.11 × 879.58
  4. Step 4: Simplify right side
    3,476.62x = 4,587,106.45
  5. Step 5: Solve for x
    x = 4,587,106.45/3,476.62
  6. Step 6: Final answer
    x = 1,319.42

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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.