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Finding the Fourth Proportional to 751.41, 1,126.80 and 231.28

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Solution

The fourth proportional to 751.41, 1,126.80 and 231.28 is: 346.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.41 : 1,126.80 = 231.28 : x
  2. Step 2: Convert to fraction form
    751.41/1,126.80 = 231.28/x
  3. Step 3: Cross multiply
    751.41x = 1,126.80 × 231.28
  4. Step 4: Simplify right side
    751.41x = 260,606.30
  5. Step 5: Solve for x
    x = 260,606.30/751.41
  6. Step 6: Final answer
    x = 346.82

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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.