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Finding the Fourth Proportional to 7.31, 10.98 and 4.79

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Solution

The fourth proportional to 7.31, 10.98 and 4.79 is: 7.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.31 : 10.98 = 4.79 : x
  2. Step 2: Convert to fraction form
    7.31/10.98 = 4.79/x
  3. Step 3: Cross multiply
    7.31x = 10.98 × 4.79
  4. Step 4: Simplify right side
    7.31x = 52.62
  5. Step 5: Solve for x
    x = 52.62/7.31
  6. Step 6: Final answer
    x = 7.20

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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.