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Finding the Fourth Proportional to 517.41, 776.21 and 286.52

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Solution

The fourth proportional to 517.41, 776.21 and 286.52 is: 429.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.41 : 776.21 = 286.52 : x
  2. Step 2: Convert to fraction form
    517.41/776.21 = 286.52/x
  3. Step 3: Cross multiply
    517.41x = 776.21 × 286.52
  4. Step 4: Simplify right side
    517.41x = 222,394.38
  5. Step 5: Solve for x
    x = 222,394.38/517.41
  6. Step 6: Final answer
    x = 429.82

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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.