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Finding the Fourth Proportional to 605.72, 906.61 and 548.89

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Solution

The fourth proportional to 605.72, 906.61 and 548.89 is: 821.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.72 : 906.61 = 548.89 : x
  2. Step 2: Convert to fraction form
    605.72/906.61 = 548.89/x
  3. Step 3: Cross multiply
    605.72x = 906.61 × 548.89
  4. Step 4: Simplify right side
    605.72x = 497,629.16
  5. Step 5: Solve for x
    x = 497,629.16/605.72
  6. Step 6: Final answer
    x = 821.55

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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.