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Finding the Fourth Proportional to 559.61, 772.35 and 338.57

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Solution

The fourth proportional to 559.61, 772.35 and 338.57 is: 467.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.61 : 772.35 = 338.57 : x
  2. Step 2: Convert to fraction form
    559.61/772.35 = 338.57/x
  3. Step 3: Cross multiply
    559.61x = 772.35 × 338.57
  4. Step 4: Simplify right side
    559.61x = 261,494.54
  5. Step 5: Solve for x
    x = 261,494.54/559.61
  6. Step 6: Final answer
    x = 467.28

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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.