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Finding the Fourth Proportional to 561.05, 773.96 and 339.96

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Solution

The fourth proportional to 561.05, 773.96 and 339.96 is: 468.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.05 : 773.96 = 339.96 : x
  2. Step 2: Convert to fraction form
    561.05/773.96 = 339.96/x
  3. Step 3: Cross multiply
    561.05x = 773.96 × 339.96
  4. Step 4: Simplify right side
    561.05x = 263,113.38
  5. Step 5: Solve for x
    x = 263,113.38/561.05
  6. Step 6: Final answer
    x = 468.96

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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.