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Finding the Fourth Proportional to 548.55, 823.77 and 486.99

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Solution

The fourth proportional to 548.55, 823.77 and 486.99 is: 731.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.55 : 823.77 = 486.99 : x
  2. Step 2: Convert to fraction form
    548.55/823.77 = 486.99/x
  3. Step 3: Cross multiply
    548.55x = 823.77 × 486.99
  4. Step 4: Simplify right side
    548.55x = 401,167.75
  5. Step 5: Solve for x
    x = 401,167.75/548.55
  6. Step 6: Final answer
    x = 731.32

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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.