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Finding the Fourth Proportional to 202.25, 279.24 and 155.54

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Solution

The fourth proportional to 202.25, 279.24 and 155.54 is: 214.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.25 : 279.24 = 155.54 : x
  2. Step 2: Convert to fraction form
    202.25/279.24 = 155.54/x
  3. Step 3: Cross multiply
    202.25x = 279.24 × 155.54
  4. Step 4: Simplify right side
    202.25x = 43,432.76
  5. Step 5: Solve for x
    x = 43,432.76/202.25
  6. Step 6: Final answer
    x = 214.75

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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.