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Finding the Fourth Proportional to 552.51, 828.31 and 378.75

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Solution

The fourth proportional to 552.51, 828.31 and 378.75 is: 567.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.51 : 828.31 = 378.75 : x
  2. Step 2: Convert to fraction form
    552.51/828.31 = 378.75/x
  3. Step 3: Cross multiply
    552.51x = 828.31 × 378.75
  4. Step 4: Simplify right side
    552.51x = 313,722.41
  5. Step 5: Solve for x
    x = 313,722.41/552.51
  6. Step 6: Final answer
    x = 567.81

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Double scale
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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.