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Finding the Fourth Proportional to 586.18, 879.27 and 221.38

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Solution

The fourth proportional to 586.18, 879.27 and 221.38 is: 332.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.18 : 879.27 = 221.38 : x
  2. Step 2: Convert to fraction form
    586.18/879.27 = 221.38/x
  3. Step 3: Cross multiply
    586.18x = 879.27 × 221.38
  4. Step 4: Simplify right side
    586.18x = 194,650.59
  5. Step 5: Solve for x
    x = 194,650.59/586.18
  6. Step 6: Final answer
    x = 332.07

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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.