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Finding the Fourth Proportional to 885, 1,325.61 and 519.15

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Solution

The fourth proportional to 885, 1,325.61 and 519.15 is: 777.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    885 : 1,325.61 = 519.15 : x
  2. Step 2: Convert to fraction form
    885/1,325.61 = 519.15/x
  3. Step 3: Cross multiply
    885x = 1,325.61 × 519.15
  4. Step 4: Simplify right side
    885x = 688,190.43
  5. Step 5: Solve for x
    x = 688,190.43/885
  6. Step 6: Final answer
    x = 777.62

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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.