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Finding the Fourth Proportional to 561.17, 773.97 and 339.89

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Solution

The fourth proportional to 561.17, 773.97 and 339.89 is: 468.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.17 : 773.97 = 339.89 : x
  2. Step 2: Convert to fraction form
    561.17/773.97 = 339.89/x
  3. Step 3: Cross multiply
    561.17x = 773.97 × 339.89
  4. Step 4: Simplify right side
    561.17x = 263,060.79
  5. Step 5: Solve for x
    x = 263,060.79/561.17
  6. Step 6: Final answer
    x = 468.78

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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.