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Finding the Fourth Proportional to 546.80, 820.45 and 400.69

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Solution

The fourth proportional to 546.80, 820.45 and 400.69 is: 601.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.80 : 820.45 = 400.69 : x
  2. Step 2: Convert to fraction form
    546.80/820.45 = 400.69/x
  3. Step 3: Cross multiply
    546.80x = 820.45 × 400.69
  4. Step 4: Simplify right side
    546.80x = 328,747.64
  5. Step 5: Solve for x
    x = 328,747.64/546.80
  6. Step 6: Final answer
    x = 601.23

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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.