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Finding the Fourth Proportional to 213.88, 295.18 and 155.70

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Solution

The fourth proportional to 213.88, 295.18 and 155.70 is: 214.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.88 : 295.18 = 155.70 : x
  2. Step 2: Convert to fraction form
    213.88/295.18 = 155.70/x
  3. Step 3: Cross multiply
    213.88x = 295.18 × 155.70
  4. Step 4: Simplify right side
    213.88x = 45,959.53
  5. Step 5: Solve for x
    x = 45,959.53/213.88
  6. Step 6: Final answer
    x = 214.88

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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.