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Finding the Fourth Proportional to 1,513.80, 2,089.09 and 850.62

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Solution

The fourth proportional to 1,513.80, 2,089.09 and 850.62 is: 1,173.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,513.80 : 2,089.09 = 850.62 : x
  2. Step 2: Convert to fraction form
    1,513.80/2,089.09 = 850.62/x
  3. Step 3: Cross multiply
    1,513.80x = 2,089.09 × 850.62
  4. Step 4: Simplify right side
    1,513.80x = 1,777,011.29
  5. Step 5: Solve for x
    x = 1,777,011.29/1,513.80
  6. Step 6: Final answer
    x = 1,173.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.