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Finding the Fourth Proportional to 30.32, 45.69 and 28.66

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Solution

The fourth proportional to 30.32, 45.69 and 28.66 is: 43.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.32 : 45.69 = 28.66 : x
  2. Step 2: Convert to fraction form
    30.32/45.69 = 28.66/x
  3. Step 3: Cross multiply
    30.32x = 45.69 × 28.66
  4. Step 4: Simplify right side
    30.32x = 1,309.10
  5. Step 5: Solve for x
    x = 1,309.10/30.32
  6. Step 6: Final answer
    x = 43.18

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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.