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Finding the Fourth Proportional to 559.81, 772.36 and 338.76

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Solution

The fourth proportional to 559.81, 772.36 and 338.76 is: 467.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.81 : 772.36 = 338.76 : x
  2. Step 2: Convert to fraction form
    559.81/772.36 = 338.76/x
  3. Step 3: Cross multiply
    559.81x = 772.36 × 338.76
  4. Step 4: Simplify right side
    559.81x = 261,642.61
  5. Step 5: Solve for x
    x = 261,642.61/559.81
  6. Step 6: Final answer
    x = 467.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.