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Finding the Fourth Proportional to 477.81, 716.78 and 169.85

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Solution

The fourth proportional to 477.81, 716.78 and 169.85 is: 254.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.81 : 716.78 = 169.85 : x
  2. Step 2: Convert to fraction form
    477.81/716.78 = 169.85/x
  3. Step 3: Cross multiply
    477.81x = 716.78 × 169.85
  4. Step 4: Simplify right side
    477.81x = 121,740.65
  5. Step 5: Solve for x
    x = 121,740.65/477.81
  6. Step 6: Final answer
    x = 254.79

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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.