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Finding the Fourth Proportional to 7.09, 9.80 and 5.95

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Solution

The fourth proportional to 7.09, 9.80 and 5.95 is: 8.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.09 : 9.80 = 5.95 : x
  2. Step 2: Convert to fraction form
    7.09/9.80 = 5.95/x
  3. Step 3: Cross multiply
    7.09x = 9.80 × 5.95
  4. Step 4: Simplify right side
    7.09x = 58.28
  5. Step 5: Solve for x
    x = 58.28/7.09
  6. Step 6: Final answer
    x = 8.22

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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.