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Finding the Fourth Proportional to 1,129.88, 1,694.22 and 581.84

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Solution

The fourth proportional to 1,129.88, 1,694.22 and 581.84 is: 872.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,129.88 : 1,694.22 = 581.84 : x
  2. Step 2: Convert to fraction form
    1,129.88/1,694.22 = 581.84/x
  3. Step 3: Cross multiply
    1,129.88x = 1,694.22 × 581.84
  4. Step 4: Simplify right side
    1,129.88x = 985,764.96
  5. Step 5: Solve for x
    x = 985,764.96/1,129.88
  6. Step 6: Final answer
    x = 872.45

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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.