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Finding the Fourth Proportional to 507.78, 700.92 and 397.44

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Solution

The fourth proportional to 507.78, 700.92 and 397.44 is: 548.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.78 : 700.92 = 397.44 : x
  2. Step 2: Convert to fraction form
    507.78/700.92 = 397.44/x
  3. Step 3: Cross multiply
    507.78x = 700.92 × 397.44
  4. Step 4: Simplify right side
    507.78x = 278,573.64
  5. Step 5: Solve for x
    x = 278,573.64/507.78
  6. Step 6: Final answer
    x = 548.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.