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Finding the Fourth Proportional to 557.85, 768.99 and 439.62

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Solution

The fourth proportional to 557.85, 768.99 and 439.62 is: 606.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.85 : 768.99 = 439.62 : x
  2. Step 2: Convert to fraction form
    557.85/768.99 = 439.62/x
  3. Step 3: Cross multiply
    557.85x = 768.99 × 439.62
  4. Step 4: Simplify right side
    557.85x = 338,063.38
  5. Step 5: Solve for x
    x = 338,063.38/557.85
  6. Step 6: Final answer
    x = 606.01

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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.