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Finding the Fourth Proportional to 7.24, 10.85 and 4.71

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Solution

The fourth proportional to 7.24, 10.85 and 4.71 is: 7.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.24 : 10.85 = 4.71 : x
  2. Step 2: Convert to fraction form
    7.24/10.85 = 4.71/x
  3. Step 3: Cross multiply
    7.24x = 10.85 × 4.71
  4. Step 4: Simplify right side
    7.24x = 51.10
  5. Step 5: Solve for x
    x = 51.10/7.24
  6. Step 6: Final answer
    x = 7.06

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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.