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Finding the Fourth Proportional to 7.49, 10.39 and 7.16

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Solution

The fourth proportional to 7.49, 10.39 and 7.16 is: 9.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.49 : 10.39 = 7.16 : x
  2. Step 2: Convert to fraction form
    7.49/10.39 = 7.16/x
  3. Step 3: Cross multiply
    7.49x = 10.39 × 7.16
  4. Step 4: Simplify right side
    7.49x = 74.32
  5. Step 5: Solve for x
    x = 74.32/7.49
  6. Step 6: Final answer
    x = 9.93

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.