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Finding the Fourth Proportional to 202.80, 279.56 and 147.45

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Solution

The fourth proportional to 202.80, 279.56 and 147.45 is: 203.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.80 : 279.56 = 147.45 : x
  2. Step 2: Convert to fraction form
    202.80/279.56 = 147.45/x
  3. Step 3: Cross multiply
    202.80x = 279.56 × 147.45
  4. Step 4: Simplify right side
    202.80x = 41,221.12
  5. Step 5: Solve for x
    x = 41,221.12/202.80
  6. Step 6: Final answer
    x = 203.26

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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.