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Finding the Fourth Proportional to 615.79, 923.82 and 286.49

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Solution

The fourth proportional to 615.79, 923.82 and 286.49 is: 429.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.79 : 923.82 = 286.49 : x
  2. Step 2: Convert to fraction form
    615.79/923.82 = 286.49/x
  3. Step 3: Cross multiply
    615.79x = 923.82 × 286.49
  4. Step 4: Simplify right side
    615.79x = 264,662.84
  5. Step 5: Solve for x
    x = 264,662.84/615.79
  6. Step 6: Final answer
    x = 429.79

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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.