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Finding the Fourth Proportional to 4.61, 6.87 and 4.11

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Solution

The fourth proportional to 4.61, 6.87 and 4.11 is: 6.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    4.61 : 6.87 = 4.11 : x
  2. Step 2: Convert to fraction form
    4.61/6.87 = 4.11/x
  3. Step 3: Cross multiply
    4.61x = 6.87 × 4.11
  4. Step 4: Simplify right side
    4.61x = 28.24
  5. Step 5: Solve for x
    x = 28.24/4.61
  6. Step 6: Final answer
    x = 6.12

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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.