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Finding the Fourth Proportional to 6.59, 9.89 and 4.81

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Solution

The fourth proportional to 6.59, 9.89 and 4.81 is: 7.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.59 : 9.89 = 4.81 : x
  2. Step 2: Convert to fraction form
    6.59/9.89 = 4.81/x
  3. Step 3: Cross multiply
    6.59x = 9.89 × 4.81
  4. Step 4: Simplify right side
    6.59x = 47.57
  5. Step 5: Solve for x
    x = 47.57/6.59
  6. Step 6: Final answer
    x = 7.22

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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.