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Finding the Fourth Proportional to 615.14, 922.76 and 306.79

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Solution

The fourth proportional to 615.14, 922.76 and 306.79 is: 460.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.14 : 922.76 = 306.79 : x
  2. Step 2: Convert to fraction form
    615.14/922.76 = 306.79/x
  3. Step 3: Cross multiply
    615.14x = 922.76 × 306.79
  4. Step 4: Simplify right side
    615.14x = 283,087.39
  5. Step 5: Solve for x
    x = 283,087.39/615.14
  6. Step 6: Final answer
    x = 460.20

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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.