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Finding the Fourth Proportional to 10.28, 15.48 and 7.62

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Solution

The fourth proportional to 10.28, 15.48 and 7.62 is: 11.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.28 : 15.48 = 7.62 : x
  2. Step 2: Convert to fraction form
    10.28/15.48 = 7.62/x
  3. Step 3: Cross multiply
    10.28x = 15.48 × 7.62
  4. Step 4: Simplify right side
    10.28x = 117.96
  5. Step 5: Solve for x
    x = 117.96/10.28
  6. Step 6: Final answer
    x = 11.47

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.