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Finding the Fourth Proportional to 397.94, 547.17 and 339.62

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Solution

The fourth proportional to 397.94, 547.17 and 339.62 is: 466.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.94 : 547.17 = 339.62 : x
  2. Step 2: Convert to fraction form
    397.94/547.17 = 339.62/x
  3. Step 3: Cross multiply
    397.94x = 547.17 × 339.62
  4. Step 4: Simplify right side
    397.94x = 185,829.88
  5. Step 5: Solve for x
    x = 185,829.88/397.94
  6. Step 6: Final answer
    x = 466.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.