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Finding the Fourth Proportional to 1,091.05, 1,635.50 and 360.14

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Solution

The fourth proportional to 1,091.05, 1,635.50 and 360.14 is: 539.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,091.05 : 1,635.50 = 360.14 : x
  2. Step 2: Convert to fraction form
    1,091.05/1,635.50 = 360.14/x
  3. Step 3: Cross multiply
    1,091.05x = 1,635.50 × 360.14
  4. Step 4: Simplify right side
    1,091.05x = 589,001.69
  5. Step 5: Solve for x
    x = 589,001.69/1,091.05
  6. Step 6: Final answer
    x = 539.85

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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.