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Finding the Fourth Proportional to 549.87, 824.81 and 486.09

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Solution

The fourth proportional to 549.87, 824.81 and 486.09 is: 729.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.87 : 824.81 = 486.09 : x
  2. Step 2: Convert to fraction form
    549.87/824.81 = 486.09/x
  3. Step 3: Cross multiply
    549.87x = 824.81 × 486.09
  4. Step 4: Simplify right side
    549.87x = 400,929.46
  5. Step 5: Solve for x
    x = 400,929.46/549.87
  6. Step 6: Final answer
    x = 729.14

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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.