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Finding the Fourth Proportional to 30.12, 44.82 and 30.03

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Solution

The fourth proportional to 30.12, 44.82 and 30.03 is: 44.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.12 : 44.82 = 30.03 : x
  2. Step 2: Convert to fraction form
    30.12/44.82 = 30.03/x
  3. Step 3: Cross multiply
    30.12x = 44.82 × 30.03
  4. Step 4: Simplify right side
    30.12x = 1,345.94
  5. Step 5: Solve for x
    x = 1,345.94/30.12
  6. Step 6: Final answer
    x = 44.69

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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.