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Finding the Fourth Proportional to 729.37, 1,091.90 and 472.33

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Solution

The fourth proportional to 729.37, 1,091.90 and 472.33 is: 707.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    729.37 : 1,091.90 = 472.33 : x
  2. Step 2: Convert to fraction form
    729.37/1,091.90 = 472.33/x
  3. Step 3: Cross multiply
    729.37x = 1,091.90 × 472.33
  4. Step 4: Simplify right side
    729.37x = 515,734.77
  5. Step 5: Solve for x
    x = 515,734.77/729.37
  6. Step 6: Final answer
    x = 707.10

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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.