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Finding the Fourth Proportional to 1,518.43, 2,095.62 and 855.31

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Solution

The fourth proportional to 1,518.43, 2,095.62 and 855.31 is: 1,180.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,518.43 : 2,095.62 = 855.31 : x
  2. Step 2: Convert to fraction form
    1,518.43/2,095.62 = 855.31/x
  3. Step 3: Cross multiply
    1,518.43x = 2,095.62 × 855.31
  4. Step 4: Simplify right side
    1,518.43x = 1,792,404.74
  5. Step 5: Solve for x
    x = 1,792,404.74/1,518.43
  6. Step 6: Final answer
    x = 1,180.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.