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Finding the Fourth Proportional to 279.07, 418.16 and 141.92

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Solution

The fourth proportional to 279.07, 418.16 and 141.92 is: 212.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.07 : 418.16 = 141.92 : x
  2. Step 2: Convert to fraction form
    279.07/418.16 = 141.92/x
  3. Step 3: Cross multiply
    279.07x = 418.16 × 141.92
  4. Step 4: Simplify right side
    279.07x = 59,345.27
  5. Step 5: Solve for x
    x = 59,345.27/279.07
  6. Step 6: Final answer
    x = 212.65

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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.