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Finding the Fourth Proportional to 790.87, 1,091.33 and 459.37

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Solution

The fourth proportional to 790.87, 1,091.33 and 459.37 is: 633.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.87 : 1,091.33 = 459.37 : x
  2. Step 2: Convert to fraction form
    790.87/1,091.33 = 459.37/x
  3. Step 3: Cross multiply
    790.87x = 1,091.33 × 459.37
  4. Step 4: Simplify right side
    790.87x = 501,321.97
  5. Step 5: Solve for x
    x = 501,321.97/790.87
  6. Step 6: Final answer
    x = 633.88

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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.