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Finding the Fourth Proportional to 901.22, 1,243.56 and 528.11

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Solution

The fourth proportional to 901.22, 1,243.56 and 528.11 is: 728.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.22 : 1,243.56 = 528.11 : x
  2. Step 2: Convert to fraction form
    901.22/1,243.56 = 528.11/x
  3. Step 3: Cross multiply
    901.22x = 1,243.56 × 528.11
  4. Step 4: Simplify right side
    901.22x = 656,741.56
  5. Step 5: Solve for x
    x = 656,741.56/901.22
  6. Step 6: Final answer
    x = 728.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.