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Finding the Fourth Proportional to 1,605.06, 2,215 and 941.92

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Solution

The fourth proportional to 1,605.06, 2,215 and 941.92 is: 1,299.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,605.06 : 2,215 = 941.92 : x
  2. Step 2: Convert to fraction form
    1,605.06/2,215 = 941.92/x
  3. Step 3: Cross multiply
    1,605.06x = 2,215 × 941.92
  4. Step 4: Simplify right side
    1,605.06x = 2,086,352.80
  5. Step 5: Solve for x
    x = 2,086,352.80/1,605.06
  6. Step 6: Final answer
    x = 1,299.86

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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.