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Finding the Fourth Proportional to 546.63, 753.12 and 378.42

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Solution

The fourth proportional to 546.63, 753.12 and 378.42 is: 521.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.63 : 753.12 = 378.42 : x
  2. Step 2: Convert to fraction form
    546.63/753.12 = 378.42/x
  3. Step 3: Cross multiply
    546.63x = 753.12 × 378.42
  4. Step 4: Simplify right side
    546.63x = 284,995.67
  5. Step 5: Solve for x
    x = 284,995.67/546.63
  6. Step 6: Final answer
    x = 521.37

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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.