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Finding the Fourth Proportional to 7.79, 10.75 and 5.49

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Solution

The fourth proportional to 7.79, 10.75 and 5.49 is: 7.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.79 : 10.75 = 5.49 : x
  2. Step 2: Convert to fraction form
    7.79/10.75 = 5.49/x
  3. Step 3: Cross multiply
    7.79x = 10.75 × 5.49
  4. Step 4: Simplify right side
    7.79x = 58.96
  5. Step 5: Solve for x
    x = 58.96/7.79
  6. Step 6: Final answer
    x = 7.57

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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.