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Finding the Fourth Proportional to 507.54, 761.31 and 122.79

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Solution

The fourth proportional to 507.54, 761.31 and 122.79 is: 184.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.54 : 761.31 = 122.79 : x
  2. Step 2: Convert to fraction form
    507.54/761.31 = 122.79/x
  3. Step 3: Cross multiply
    507.54x = 761.31 × 122.79
  4. Step 4: Simplify right side
    507.54x = 93,481.25
  5. Step 5: Solve for x
    x = 93,481.25/507.54
  6. Step 6: Final answer
    x = 184.19

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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.