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Finding the Fourth Proportional to 6.43, 9.63 and 5.71

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Solution

The fourth proportional to 6.43, 9.63 and 5.71 is: 8.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.43 : 9.63 = 5.71 : x
  2. Step 2: Convert to fraction form
    6.43/9.63 = 5.71/x
  3. Step 3: Cross multiply
    6.43x = 9.63 × 5.71
  4. Step 4: Simplify right side
    6.43x = 54.99
  5. Step 5: Solve for x
    x = 54.99/6.43
  6. Step 6: Final answer
    x = 8.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.