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Finding the Fourth Proportional to 1,338.35, 2,008.53 and 516.80

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Solution

The fourth proportional to 1,338.35, 2,008.53 and 516.80 is: 775.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,338.35 : 2,008.53 = 516.80 : x
  2. Step 2: Convert to fraction form
    1,338.35/2,008.53 = 516.80/x
  3. Step 3: Cross multiply
    1,338.35x = 2,008.53 × 516.80
  4. Step 4: Simplify right side
    1,338.35x = 1,038,013.33
  5. Step 5: Solve for x
    x = 1,038,013.33/1,338.35
  6. Step 6: Final answer
    x = 775.59

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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.