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Finding the Fourth Proportional to 519.43, 779.05 and 172.96

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Solution

The fourth proportional to 519.43, 779.05 and 172.96 is: 259.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.43 : 779.05 = 172.96 : x
  2. Step 2: Convert to fraction form
    519.43/779.05 = 172.96/x
  3. Step 3: Cross multiply
    519.43x = 779.05 × 172.96
  4. Step 4: Simplify right side
    519.43x = 134,743.62
  5. Step 5: Solve for x
    x = 134,743.62/519.43
  6. Step 6: Final answer
    x = 259.41

Related Problems

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Double scale
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Similar ratio
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1.5x scale

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.