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Finding the Fourth Proportional to 900.97, 1,243.40 and 528.37

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Solution

The fourth proportional to 900.97, 1,243.40 and 528.37 is: 729.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.97 : 1,243.40 = 528.37 : x
  2. Step 2: Convert to fraction form
    900.97/1,243.40 = 528.37/x
  3. Step 3: Cross multiply
    900.97x = 1,243.40 × 528.37
  4. Step 4: Simplify right side
    900.97x = 656,978.37
  5. Step 5: Solve for x
    x = 656,978.37/900.97
  6. Step 6: Final answer
    x = 729.19

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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.