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Finding the Fourth Proportional to 790.84, 1,091.37 and 459.33

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Solution

The fourth proportional to 790.84, 1,091.37 and 459.33 is: 633.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.84 : 1,091.37 = 459.33 : x
  2. Step 2: Convert to fraction form
    790.84/1,091.37 = 459.33/x
  3. Step 3: Cross multiply
    790.84x = 1,091.37 × 459.33
  4. Step 4: Simplify right side
    790.84x = 501,298.98
  5. Step 5: Solve for x
    x = 501,298.98/790.84
  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.