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Finding the Fourth Proportional to 1,012.62, 1,518.18 and 395.79

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Solution

The fourth proportional to 1,012.62, 1,518.18 and 395.79 is: 593.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,012.62 : 1,518.18 = 395.79 : x
  2. Step 2: Convert to fraction form
    1,012.62/1,518.18 = 395.79/x
  3. Step 3: Cross multiply
    1,012.62x = 1,518.18 × 395.79
  4. Step 4: Simplify right side
    1,012.62x = 600,880.46
  5. Step 5: Solve for x
    x = 600,880.46/1,012.62
  6. Step 6: Final answer
    x = 593.39

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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.