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Finding the Fourth Proportional to 2.29, 3.15 and 1.71

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Solution

The fourth proportional to 2.29, 3.15 and 1.71 is: 2.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.29 : 3.15 = 1.71 : x
  2. Step 2: Convert to fraction form
    2.29/3.15 = 1.71/x
  3. Step 3: Cross multiply
    2.29x = 3.15 × 1.71
  4. Step 4: Simplify right side
    2.29x = 5.38
  5. Step 5: Solve for x
    x = 5.38/2.29
  6. Step 6: Final answer
    x = 2.35

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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.