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Finding the Fourth Proportional to 558.11, 836.02 and 261.19

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Solution

The fourth proportional to 558.11, 836.02 and 261.19 is: 391.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.11 : 836.02 = 261.19 : x
  2. Step 2: Convert to fraction form
    558.11/836.02 = 261.19/x
  3. Step 3: Cross multiply
    558.11x = 836.02 × 261.19
  4. Step 4: Simplify right side
    558.11x = 218,358.76
  5. Step 5: Solve for x
    x = 218,358.76/558.11
  6. Step 6: Final answer
    x = 391.25

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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.