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Finding the Fourth Proportional to 202.56, 279.80 and 155.01

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Solution

The fourth proportional to 202.56, 279.80 and 155.01 is: 214.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.56 : 279.80 = 155.01 : x
  2. Step 2: Convert to fraction form
    202.56/279.80 = 155.01/x
  3. Step 3: Cross multiply
    202.56x = 279.80 × 155.01
  4. Step 4: Simplify right side
    202.56x = 43,371.98
  5. Step 5: Solve for x
    x = 43,371.98/202.56
  6. Step 6: Final answer
    x = 214.11

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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.