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Finding the Fourth Proportional to 549.83, 823.11 and 405.65

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Solution

The fourth proportional to 549.83, 823.11 and 405.65 is: 607.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.83 : 823.11 = 405.65 : x
  2. Step 2: Convert to fraction form
    549.83/823.11 = 405.65/x
  3. Step 3: Cross multiply
    549.83x = 823.11 × 405.65
  4. Step 4: Simplify right side
    549.83x = 333,895.11
  5. Step 5: Solve for x
    x = 333,895.11/549.83
  6. Step 6: Final answer
    x = 607.27

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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.