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Finding the Fourth Proportional to 293.80, 405.80 and 195.40

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Solution

The fourth proportional to 293.80, 405.80 and 195.40 is: 269.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.80 : 405.80 = 195.40 : x
  2. Step 2: Convert to fraction form
    293.80/405.80 = 195.40/x
  3. Step 3: Cross multiply
    293.80x = 405.80 × 195.40
  4. Step 4: Simplify right side
    293.80x = 79,293.32
  5. Step 5: Solve for x
    x = 79,293.32/293.80
  6. Step 6: Final answer
    x = 269.89

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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.