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Finding the Fourth Proportional to 30.12, 44.88 and 29.92

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Solution

The fourth proportional to 30.12, 44.88 and 29.92 is: 44.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.12 : 44.88 = 29.92 : x
  2. Step 2: Convert to fraction form
    30.12/44.88 = 29.92/x
  3. Step 3: Cross multiply
    30.12x = 44.88 × 29.92
  4. Step 4: Simplify right side
    30.12x = 1,342.81
  5. Step 5: Solve for x
    x = 1,342.81/30.12
  6. Step 6: Final answer
    x = 44.58

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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.