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Finding the Fourth Proportional to 6.29, 9.40 and 5.17

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Solution

The fourth proportional to 6.29, 9.40 and 5.17 is: 7.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.29 : 9.40 = 5.17 : x
  2. Step 2: Convert to fraction form
    6.29/9.40 = 5.17/x
  3. Step 3: Cross multiply
    6.29x = 9.40 × 5.17
  4. Step 4: Simplify right side
    6.29x = 48.56
  5. Step 5: Solve for x
    x = 48.56/6.29
  6. Step 6: Final answer
    x = 7.72

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.