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Finding the Fourth Proportional to 519.42, 779.26 and 259.56

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Solution

The fourth proportional to 519.42, 779.26 and 259.56 is: 389.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.42 : 779.26 = 259.56 : x
  2. Step 2: Convert to fraction form
    519.42/779.26 = 259.56/x
  3. Step 3: Cross multiply
    519.42x = 779.26 × 259.56
  4. Step 4: Simplify right side
    519.42x = 202,264.73
  5. Step 5: Solve for x
    x = 202,264.73/519.42
  6. Step 6: Final answer
    x = 389.40

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.