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Finding the Fourth Proportional to 586.30, 879.36 and 221.26

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Solution

The fourth proportional to 586.30, 879.36 and 221.26 is: 331.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.30 : 879.36 = 221.26 : x
  2. Step 2: Convert to fraction form
    586.30/879.36 = 221.26/x
  3. Step 3: Cross multiply
    586.30x = 879.36 × 221.26
  4. Step 4: Simplify right side
    586.30x = 194,567.19
  5. Step 5: Solve for x
    x = 194,567.19/586.30
  6. Step 6: Final answer
    x = 331.86

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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.