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Finding the Fourth Proportional to 1,107.35, 1,660.11 and 490.87

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Solution

The fourth proportional to 1,107.35, 1,660.11 and 490.87 is: 735.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,107.35 : 1,660.11 = 490.87 : x
  2. Step 2: Convert to fraction form
    1,107.35/1,660.11 = 490.87/x
  3. Step 3: Cross multiply
    1,107.35x = 1,660.11 × 490.87
  4. Step 4: Simplify right side
    1,107.35x = 814,898.20
  5. Step 5: Solve for x
    x = 814,898.20/1,107.35
  6. Step 6: Final answer
    x = 735.90

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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.