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Finding the Fourth Proportional to 515.42, 773.51 and 378.82

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Solution

The fourth proportional to 515.42, 773.51 and 378.82 is: 568.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.42 : 773.51 = 378.82 : x
  2. Step 2: Convert to fraction form
    515.42/773.51 = 378.82/x
  3. Step 3: Cross multiply
    515.42x = 773.51 × 378.82
  4. Step 4: Simplify right side
    515.42x = 293,021.06
  5. Step 5: Solve for x
    x = 293,021.06/515.42
  6. Step 6: Final answer
    x = 568.51

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Double scale
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Similar ratio
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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.