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Finding the Fourth Proportional to 1,640.60, 2,263.96 and 894.55

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Solution

The fourth proportional to 1,640.60, 2,263.96 and 894.55 is: 1,234.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.60 : 2,263.96 = 894.55 : x
  2. Step 2: Convert to fraction form
    1,640.60/2,263.96 = 894.55/x
  3. Step 3: Cross multiply
    1,640.60x = 2,263.96 × 894.55
  4. Step 4: Simplify right side
    1,640.60x = 2,025,214.10
  5. Step 5: Solve for x
    x = 2,025,214.10/1,640.60
  6. Step 6: Final answer
    x = 1,234.44

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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.