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Finding the Fourth Proportional to 559.16, 838.10 and 212.20

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Solution

The fourth proportional to 559.16, 838.10 and 212.20 is: 318.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.16 : 838.10 = 212.20 : x
  2. Step 2: Convert to fraction form
    559.16/838.10 = 212.20/x
  3. Step 3: Cross multiply
    559.16x = 838.10 × 212.20
  4. Step 4: Simplify right side
    559.16x = 177,844.82
  5. Step 5: Solve for x
    x = 177,844.82/559.16
  6. Step 6: Final answer
    x = 318.06

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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.