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Finding the Fourth Proportional to 1,015.83, 1,523.09 and 668.11

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Solution

The fourth proportional to 1,015.83, 1,523.09 and 668.11 is: 1,001.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.83 : 1,523.09 = 668.11 : x
  2. Step 2: Convert to fraction form
    1,015.83/1,523.09 = 668.11/x
  3. Step 3: Cross multiply
    1,015.83x = 1,523.09 × 668.11
  4. Step 4: Simplify right side
    1,015.83x = 1,017,592.10
  5. Step 5: Solve for x
    x = 1,017,592.10/1,015.83
  6. Step 6: Final answer
    x = 1,001.73

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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.