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Finding the Fourth Proportional to 30.86, 46.05 and 27.65

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Solution

The fourth proportional to 30.86, 46.05 and 27.65 is: 41.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.86 : 46.05 = 27.65 : x
  2. Step 2: Convert to fraction form
    30.86/46.05 = 27.65/x
  3. Step 3: Cross multiply
    30.86x = 46.05 × 27.65
  4. Step 4: Simplify right side
    30.86x = 1,273.28
  5. Step 5: Solve for x
    x = 1,273.28/30.86
  6. Step 6: Final answer
    x = 41.26

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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.