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Finding the Fourth Proportional to 1,618.97, 2,234.09 and 920.57

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Solution

The fourth proportional to 1,618.97, 2,234.09 and 920.57 is: 1,270.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,618.97 : 2,234.09 = 920.57 : x
  2. Step 2: Convert to fraction form
    1,618.97/2,234.09 = 920.57/x
  3. Step 3: Cross multiply
    1,618.97x = 2,234.09 × 920.57
  4. Step 4: Simplify right side
    1,618.97x = 2,056,627.36
  5. Step 5: Solve for x
    x = 2,056,627.36/1,618.97
  6. Step 6: Final answer
    x = 1,270.33

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1.5x scale

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.