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Finding the Fourth Proportional to 243.14, 364.58 and 215.42

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Solution

The fourth proportional to 243.14, 364.58 and 215.42 is: 323.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.14 : 364.58 = 215.42 : x
  2. Step 2: Convert to fraction form
    243.14/364.58 = 215.42/x
  3. Step 3: Cross multiply
    243.14x = 364.58 × 215.42
  4. Step 4: Simplify right side
    243.14x = 78,536.94
  5. Step 5: Solve for x
    x = 78,536.94/243.14
  6. Step 6: Final answer
    x = 323.01

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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.