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Finding the Fourth Proportional to 559.49, 771.98 and 338.45

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Solution

The fourth proportional to 559.49, 771.98 and 338.45 is: 466.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.49 : 771.98 = 338.45 : x
  2. Step 2: Convert to fraction form
    559.49/771.98 = 338.45/x
  3. Step 3: Cross multiply
    559.49x = 771.98 × 338.45
  4. Step 4: Simplify right side
    559.49x = 261,274.94
  5. Step 5: Solve for x
    x = 261,274.94/559.49
  6. Step 6: Final answer
    x = 466.99

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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.