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Finding the Fourth Proportional to 546.12, 753.42 and 339

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Solution

The fourth proportional to 546.12, 753.42 and 339 is: 467.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.12 : 753.42 = 339 : x
  2. Step 2: Convert to fraction form
    546.12/753.42 = 339/x
  3. Step 3: Cross multiply
    546.12x = 753.42 × 339
  4. Step 4: Simplify right side
    546.12x = 255,409.38
  5. Step 5: Solve for x
    x = 255,409.38/546.12
  6. Step 6: Final answer
    x = 467.68

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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.