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Finding the Fourth Proportional to 5.86, 8.80 and 5.18

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Solution

The fourth proportional to 5.86, 8.80 and 5.18 is: 7.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.86 : 8.80 = 5.18 : x
  2. Step 2: Convert to fraction form
    5.86/8.80 = 5.18/x
  3. Step 3: Cross multiply
    5.86x = 8.80 × 5.18
  4. Step 4: Simplify right side
    5.86x = 45.58
  5. Step 5: Solve for x
    x = 45.58/5.86
  6. Step 6: Final answer
    x = 7.78

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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.