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Finding the Fourth Proportional to 4.81, 6.64 and 3.72

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Solution

The fourth proportional to 4.81, 6.64 and 3.72 is: 5.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    4.81 : 6.64 = 3.72 : x
  2. Step 2: Convert to fraction form
    4.81/6.64 = 3.72/x
  3. Step 3: Cross multiply
    4.81x = 6.64 × 3.72
  4. Step 4: Simplify right side
    4.81x = 24.66
  5. Step 5: Solve for x
    x = 24.66/4.81
  6. Step 6: Final answer
    x = 5.13

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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.