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Finding the Fourth Proportional to 548.93, 822.47 and 386.27

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Solution

The fourth proportional to 548.93, 822.47 and 386.27 is: 578.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.93 : 822.47 = 386.27 : x
  2. Step 2: Convert to fraction form
    548.93/822.47 = 386.27/x
  3. Step 3: Cross multiply
    548.93x = 822.47 × 386.27
  4. Step 4: Simplify right side
    548.93x = 317,695.49
  5. Step 5: Solve for x
    x = 317,695.49/548.93
  6. Step 6: Final answer
    x = 578.75

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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.