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Finding the Fourth Proportional to 546.72, 820.16 and 330.40

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Solution

The fourth proportional to 546.72, 820.16 and 330.40 is: 495.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.72 : 820.16 = 330.40 : x
  2. Step 2: Convert to fraction form
    546.72/820.16 = 330.40/x
  3. Step 3: Cross multiply
    546.72x = 820.16 × 330.40
  4. Step 4: Simplify right side
    546.72x = 270,980.86
  5. Step 5: Solve for x
    x = 270,980.86/546.72
  6. Step 6: Final answer
    x = 495.65

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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.