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Finding the Fourth Proportional to 559.59, 839.50 and 212.86

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Solution

The fourth proportional to 559.59, 839.50 and 212.86 is: 319.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.59 : 839.50 = 212.86 : x
  2. Step 2: Convert to fraction form
    559.59/839.50 = 212.86/x
  3. Step 3: Cross multiply
    559.59x = 839.50 × 212.86
  4. Step 4: Simplify right side
    559.59x = 178,695.97
  5. Step 5: Solve for x
    x = 178,695.97/559.59
  6. Step 6: Final answer
    x = 319.33

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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.