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Finding the Fourth Proportional to 479.93, 719.97 and 171.80

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Solution

The fourth proportional to 479.93, 719.97 and 171.80 is: 257.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.93 : 719.97 = 171.80 : x
  2. Step 2: Convert to fraction form
    479.93/719.97 = 171.80/x
  3. Step 3: Cross multiply
    479.93x = 719.97 × 171.80
  4. Step 4: Simplify right side
    479.93x = 123,687.25
  5. Step 5: Solve for x
    x = 123,687.25/479.93
  6. Step 6: Final answer
    x = 257.72

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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.