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Finding the Fourth Proportional to 549.90, 823.68 and 511.92

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Solution

The fourth proportional to 549.90, 823.68 and 511.92 is: 766.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.90 : 823.68 = 511.92 : x
  2. Step 2: Convert to fraction form
    549.90/823.68 = 511.92/x
  3. Step 3: Cross multiply
    549.90x = 823.68 × 511.92
  4. Step 4: Simplify right side
    549.90x = 421,658.27
  5. Step 5: Solve for x
    x = 421,658.27/549.90
  6. Step 6: Final answer
    x = 766.79

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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.