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Finding the Fourth Proportional to 479.45, 719.16 and 171.31

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Solution

The fourth proportional to 479.45, 719.16 and 171.31 is: 256.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.45 : 719.16 = 171.31 : x
  2. Step 2: Convert to fraction form
    479.45/719.16 = 171.31/x
  3. Step 3: Cross multiply
    479.45x = 719.16 × 171.31
  4. Step 4: Simplify right side
    479.45x = 123,195.70
  5. Step 5: Solve for x
    x = 123,195.70/479.45
  6. Step 6: Final answer
    x = 256.95

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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.