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Finding the Fourth Proportional to 1,107.70, 1,660.94 and 514.07

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Solution

The fourth proportional to 1,107.70, 1,660.94 and 514.07 is: 770.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,107.70 : 1,660.94 = 514.07 : x
  2. Step 2: Convert to fraction form
    1,107.70/1,660.94 = 514.07/x
  3. Step 3: Cross multiply
    1,107.70x = 1,660.94 × 514.07
  4. Step 4: Simplify right side
    1,107.70x = 853,839.43
  5. Step 5: Solve for x
    x = 853,839.43/1,107.70
  6. Step 6: Final answer
    x = 770.82

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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.