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Finding the Fourth Proportional to 519.41, 779.12 and 398.22

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Solution

The fourth proportional to 519.41, 779.12 and 398.22 is: 597.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.41 : 779.12 = 398.22 : x
  2. Step 2: Convert to fraction form
    519.41/779.12 = 398.22/x
  3. Step 3: Cross multiply
    519.41x = 779.12 × 398.22
  4. Step 4: Simplify right side
    519.41x = 310,257.75
  5. Step 5: Solve for x
    x = 310,257.75/519.41
  6. Step 6: Final answer
    x = 597.32

Related Problems

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Half scale
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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.