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Finding the Fourth Proportional to 230.64, 345.95 and 205.20

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Solution

The fourth proportional to 230.64, 345.95 and 205.20 is: 307.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.64 : 345.95 = 205.20 : x
  2. Step 2: Convert to fraction form
    230.64/345.95 = 205.20/x
  3. Step 3: Cross multiply
    230.64x = 345.95 × 205.20
  4. Step 4: Simplify right side
    230.64x = 70,988.94
  5. Step 5: Solve for x
    x = 70,988.94/230.64
  6. Step 6: Final answer
    x = 307.79

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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.