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Finding the Fourth Proportional to 1,107.21, 1,660.79 and 377.29

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Solution

The fourth proportional to 1,107.21, 1,660.79 and 377.29 is: 565.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,107.21 : 1,660.79 = 377.29 : x
  2. Step 2: Convert to fraction form
    1,107.21/1,660.79 = 377.29/x
  3. Step 3: Cross multiply
    1,107.21x = 1,660.79 × 377.29
  4. Step 4: Simplify right side
    1,107.21x = 626,599.46
  5. Step 5: Solve for x
    x = 626,599.46/1,107.21
  6. Step 6: Final answer
    x = 565.93

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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.