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Finding the Fourth Proportional to 549.43, 823.71 and 289.46

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Solution

The fourth proportional to 549.43, 823.71 and 289.46 is: 433.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.43 : 823.71 = 289.46 : x
  2. Step 2: Convert to fraction form
    549.43/823.71 = 289.46/x
  3. Step 3: Cross multiply
    549.43x = 823.71 × 289.46
  4. Step 4: Simplify right side
    549.43x = 238,431.10
  5. Step 5: Solve for x
    x = 238,431.10/549.43
  6. Step 6: Final answer
    x = 433.96

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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.