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Finding the Fourth Proportional to 1,350.78, 2,025 and 517.56

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Solution

The fourth proportional to 1,350.78, 2,025 and 517.56 is: 775.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,350.78 : 2,025 = 517.56 : x
  2. Step 2: Convert to fraction form
    1,350.78/2,025 = 517.56/x
  3. Step 3: Cross multiply
    1,350.78x = 2,025 × 517.56
  4. Step 4: Simplify right side
    1,350.78x = 1,048,059.00
  5. Step 5: Solve for x
    x = 1,048,059.00/1,350.78
  6. Step 6: Final answer
    x = 775.89

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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.