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Finding the Fourth Proportional to 549.63, 824.85 and 261.07

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Solution

The fourth proportional to 549.63, 824.85 and 261.07 is: 391.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.63 : 824.85 = 261.07 : x
  2. Step 2: Convert to fraction form
    549.63/824.85 = 261.07/x
  3. Step 3: Cross multiply
    549.63x = 824.85 × 261.07
  4. Step 4: Simplify right side
    549.63x = 215,343.59
  5. Step 5: Solve for x
    x = 215,343.59/549.63
  6. Step 6: Final answer
    x = 391.80

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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.