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Finding the Fourth Proportional to 1,518.70, 2,095.90 and 855.61

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Solution

The fourth proportional to 1,518.70, 2,095.90 and 855.61 is: 1,180.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,518.70 : 2,095.90 = 855.61 : x
  2. Step 2: Convert to fraction form
    1,518.70/2,095.90 = 855.61/x
  3. Step 3: Cross multiply
    1,518.70x = 2,095.90 × 855.61
  4. Step 4: Simplify right side
    1,518.70x = 1,793,273.00
  5. Step 5: Solve for x
    x = 1,793,273.00/1,518.70
  6. Step 6: Final answer
    x = 1,180.79

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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.