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Finding the Fourth Proportional to 548.67, 822.07 and 386.05

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Solution

The fourth proportional to 548.67, 822.07 and 386.05 is: 578.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.67 : 822.07 = 386.05 : x
  2. Step 2: Convert to fraction form
    548.67/822.07 = 386.05/x
  3. Step 3: Cross multiply
    548.67x = 822.07 × 386.05
  4. Step 4: Simplify right side
    548.67x = 317,360.12
  5. Step 5: Solve for x
    x = 317,360.12/548.67
  6. Step 6: Final answer
    x = 578.42

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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.