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Finding the Fourth Proportional to 586.11, 879.47 and 221.14

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Solution

The fourth proportional to 586.11, 879.47 and 221.14 is: 331.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.11 : 879.47 = 221.14 : x
  2. Step 2: Convert to fraction form
    586.11/879.47 = 221.14/x
  3. Step 3: Cross multiply
    586.11x = 879.47 × 221.14
  4. Step 4: Simplify right side
    586.11x = 194,480.49
  5. Step 5: Solve for x
    x = 194,480.49/586.11
  6. Step 6: Final answer
    x = 331.82

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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.