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Finding the Fourth Proportional to 559.56, 838.77 and 213.15

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Solution

The fourth proportional to 559.56, 838.77 and 213.15 is: 319.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.56 : 838.77 = 213.15 : x
  2. Step 2: Convert to fraction form
    559.56/838.77 = 213.15/x
  3. Step 3: Cross multiply
    559.56x = 838.77 × 213.15
  4. Step 4: Simplify right side
    559.56x = 178,783.83
  5. Step 5: Solve for x
    x = 178,783.83/559.56
  6. Step 6: Final answer
    x = 319.51

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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.