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Finding the Fourth Proportional to 279.08, 418.63 and 157.44

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Solution

The fourth proportional to 279.08, 418.63 and 157.44 is: 236.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.08 : 418.63 = 157.44 : x
  2. Step 2: Convert to fraction form
    279.08/418.63 = 157.44/x
  3. Step 3: Cross multiply
    279.08x = 418.63 × 157.44
  4. Step 4: Simplify right side
    279.08x = 65,909.11
  5. Step 5: Solve for x
    x = 65,909.11/279.08
  6. Step 6: Final answer
    x = 236.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.