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Finding the Fourth Proportional to 751.11, 1,126.68 and 203.28

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Solution

The fourth proportional to 751.11, 1,126.68 and 203.28 is: 304.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.11 : 1,126.68 = 203.28 : x
  2. Step 2: Convert to fraction form
    751.11/1,126.68 = 203.28/x
  3. Step 3: Cross multiply
    751.11x = 1,126.68 × 203.28
  4. Step 4: Simplify right side
    751.11x = 229,031.51
  5. Step 5: Solve for x
    x = 229,031.51/751.11
  6. Step 6: Final answer
    x = 304.92

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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.