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Finding the Fourth Proportional to 202.50, 279.45 and 143.59

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Solution

The fourth proportional to 202.50, 279.45 and 143.59 is: 198.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.50 : 279.45 = 143.59 : x
  2. Step 2: Convert to fraction form
    202.50/279.45 = 143.59/x
  3. Step 3: Cross multiply
    202.50x = 279.45 × 143.59
  4. Step 4: Simplify right side
    202.50x = 40,126.23
  5. Step 5: Solve for x
    x = 40,126.23/202.50
  6. Step 6: Final answer
    x = 198.15

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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.