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Finding the Fourth Proportional to 44.42, 66.87 and 30.99

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Solution

The fourth proportional to 44.42, 66.87 and 30.99 is: 46.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    44.42 : 66.87 = 30.99 : x
  2. Step 2: Convert to fraction form
    44.42/66.87 = 30.99/x
  3. Step 3: Cross multiply
    44.42x = 66.87 × 30.99
  4. Step 4: Simplify right side
    44.42x = 2,071.81
  5. Step 5: Solve for x
    x = 2,071.81/44.42
  6. Step 6: Final answer
    x = 46.64

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.