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Finding the Fourth Proportional to 557.90, 769.91 and 336.86

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Solution

The fourth proportional to 557.90, 769.91 and 336.86 is: 464.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.90 : 769.91 = 336.86 : x
  2. Step 2: Convert to fraction form
    557.90/769.91 = 336.86/x
  3. Step 3: Cross multiply
    557.90x = 769.91 × 336.86
  4. Step 4: Simplify right side
    557.90x = 259,346.35
  5. Step 5: Solve for x
    x = 259,346.35/557.90
  6. Step 6: Final answer
    x = 464.87

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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.