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Finding the Fourth Proportional to 1,107.64, 1,660.84 and 490.60

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Solution

The fourth proportional to 1,107.64, 1,660.84 and 490.60 is: 735.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,107.64 : 1,660.84 = 490.60 : x
  2. Step 2: Convert to fraction form
    1,107.64/1,660.84 = 490.60/x
  3. Step 3: Cross multiply
    1,107.64x = 1,660.84 × 490.60
  4. Step 4: Simplify right side
    1,107.64x = 814,808.10
  5. Step 5: Solve for x
    x = 814,808.10/1,107.64
  6. Step 6: Final answer
    x = 735.63

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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.