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Finding the Fourth Proportional to 1,091.18, 1,635.44 and 505.39

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Solution

The fourth proportional to 1,091.18, 1,635.44 and 505.39 is: 757.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,091.18 : 1,635.44 = 505.39 : x
  2. Step 2: Convert to fraction form
    1,091.18/1,635.44 = 505.39/x
  3. Step 3: Cross multiply
    1,091.18x = 1,635.44 × 505.39
  4. Step 4: Simplify right side
    1,091.18x = 826,528.41
  5. Step 5: Solve for x
    x = 826,528.41/1,091.18
  6. Step 6: Final answer
    x = 757.46

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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.