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Finding the Fourth Proportional to 279.65, 419.42 and 97.05

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Solution

The fourth proportional to 279.65, 419.42 and 97.05 is: 145.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.65 : 419.42 = 97.05 : x
  2. Step 2: Convert to fraction form
    279.65/419.42 = 97.05/x
  3. Step 3: Cross multiply
    279.65x = 419.42 × 97.05
  4. Step 4: Simplify right side
    279.65x = 40,704.23
  5. Step 5: Solve for x
    x = 40,704.23/279.65
  6. Step 6: Final answer
    x = 145.56

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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.