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Finding the Fourth Proportional to 586.08, 878.78 and 220.79

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Solution

The fourth proportional to 586.08, 878.78 and 220.79 is: 331.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.08 : 878.78 = 220.79 : x
  2. Step 2: Convert to fraction form
    586.08/878.78 = 220.79/x
  3. Step 3: Cross multiply
    586.08x = 878.78 × 220.79
  4. Step 4: Simplify right side
    586.08x = 194,020.34
  5. Step 5: Solve for x
    x = 194,020.34/586.08
  6. Step 6: Final answer
    x = 331.05

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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.