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Finding the Fourth Proportional to 751.07, 1,126.78 and 238.07

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Solution

The fourth proportional to 751.07, 1,126.78 and 238.07 is: 357.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.07 : 1,126.78 = 238.07 : x
  2. Step 2: Convert to fraction form
    751.07/1,126.78 = 238.07/x
  3. Step 3: Cross multiply
    751.07x = 1,126.78 × 238.07
  4. Step 4: Simplify right side
    751.07x = 268,245.69
  5. Step 5: Solve for x
    x = 268,245.69/751.07
  6. Step 6: Final answer
    x = 357.15

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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.