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Finding the Fourth Proportional to 561.92, 842.99 and 330.69

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Solution

The fourth proportional to 561.92, 842.99 and 330.69 is: 496.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.92 : 842.99 = 330.69 : x
  2. Step 2: Convert to fraction form
    561.92/842.99 = 330.69/x
  3. Step 3: Cross multiply
    561.92x = 842.99 × 330.69
  4. Step 4: Simplify right side
    561.92x = 278,769.19
  5. Step 5: Solve for x
    x = 278,769.19/561.92
  6. Step 6: Final answer
    x = 496.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.