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Finding the Fourth Proportional to 557.82, 769.72 and 321.79

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Solution

The fourth proportional to 557.82, 769.72 and 321.79 is: 444.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.82 : 769.72 = 321.79 : x
  2. Step 2: Convert to fraction form
    557.82/769.72 = 321.79/x
  3. Step 3: Cross multiply
    557.82x = 769.72 × 321.79
  4. Step 4: Simplify right side
    557.82x = 247,688.20
  5. Step 5: Solve for x
    x = 247,688.20/557.82
  6. Step 6: Final answer
    x = 444.03

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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.