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Finding the Fourth Proportional to 1,011.89, 1,517.54 and 395.48

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Solution

The fourth proportional to 1,011.89, 1,517.54 and 395.48 is: 593.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.89 : 1,517.54 = 395.48 : x
  2. Step 2: Convert to fraction form
    1,011.89/1,517.54 = 395.48/x
  3. Step 3: Cross multiply
    1,011.89x = 1,517.54 × 395.48
  4. Step 4: Simplify right side
    1,011.89x = 600,158.54
  5. Step 5: Solve for x
    x = 600,158.54/1,011.89
  6. Step 6: Final answer
    x = 593.11

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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.