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Finding the Fourth Proportional to 615.65, 922.93 and 231.17

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Solution

The fourth proportional to 615.65, 922.93 and 231.17 is: 346.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.65 : 922.93 = 231.17 : x
  2. Step 2: Convert to fraction form
    615.65/922.93 = 231.17/x
  3. Step 3: Cross multiply
    615.65x = 922.93 × 231.17
  4. Step 4: Simplify right side
    615.65x = 213,348.54
  5. Step 5: Solve for x
    x = 213,348.54/615.65
  6. Step 6: Final answer
    x = 346.54

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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.