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Finding the Fourth Proportional to 751.96, 1,127.90 and 238.96

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Solution

The fourth proportional to 751.96, 1,127.90 and 238.96 is: 358.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.96 : 1,127.90 = 238.96 : x
  2. Step 2: Convert to fraction form
    751.96/1,127.90 = 238.96/x
  3. Step 3: Cross multiply
    751.96x = 1,127.90 × 238.96
  4. Step 4: Simplify right side
    751.96x = 269,521.79
  5. Step 5: Solve for x
    x = 269,521.79/751.96
  6. Step 6: Final answer
    x = 358.43

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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.