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Finding the Fourth Proportional to 460.20, 691.38 and 379.20

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Solution

The fourth proportional to 460.20, 691.38 and 379.20 is: 569.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    460.20 : 691.38 = 379.20 : x
  2. Step 2: Convert to fraction form
    460.20/691.38 = 379.20/x
  3. Step 3: Cross multiply
    460.20x = 691.38 × 379.20
  4. Step 4: Simplify right side
    460.20x = 262,171.30
  5. Step 5: Solve for x
    x = 262,171.30/460.20
  6. Step 6: Final answer
    x = 569.69

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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.