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Finding the Fourth Proportional to 213.91, 295.18 and 131.01

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Solution

The fourth proportional to 213.91, 295.18 and 131.01 is: 180.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.91 : 295.18 = 131.01 : x
  2. Step 2: Convert to fraction form
    213.91/295.18 = 131.01/x
  3. Step 3: Cross multiply
    213.91x = 295.18 × 131.01
  4. Step 4: Simplify right side
    213.91x = 38,670.10
  5. Step 5: Solve for x
    x = 38,670.10/213.91
  6. Step 6: Final answer
    x = 180.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.