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Finding the Fourth Proportional to 1,339.46, 2,008.44 and 517.22

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Solution

The fourth proportional to 1,339.46, 2,008.44 and 517.22 is: 775.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,339.46 : 2,008.44 = 517.22 : x
  2. Step 2: Convert to fraction form
    1,339.46/2,008.44 = 517.22/x
  3. Step 3: Cross multiply
    1,339.46x = 2,008.44 × 517.22
  4. Step 4: Simplify right side
    1,339.46x = 1,038,805.34
  5. Step 5: Solve for x
    x = 1,038,805.34/1,339.46
  6. Step 6: Final answer
    x = 775.54

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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.