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Finding the Fourth Proportional to 548.30, 820.80 and 426.02

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Solution

The fourth proportional to 548.30, 820.80 and 426.02 is: 637.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.30 : 820.80 = 426.02 : x
  2. Step 2: Convert to fraction form
    548.30/820.80 = 426.02/x
  3. Step 3: Cross multiply
    548.30x = 820.80 × 426.02
  4. Step 4: Simplify right side
    548.30x = 349,677.22
  5. Step 5: Solve for x
    x = 349,677.22/548.30
  6. Step 6: Final answer
    x = 637.75

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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.