Home / 1,640.96-2,265.60-1,116.80

Finding the Fourth Proportional to 1,640.96, 2,265.60 and 1,116.80

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Solution

The fourth proportional to 1,640.96, 2,265.60 and 1,116.80 is: 1,541.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.96 : 2,265.60 = 1,116.80 : x
  2. Step 2: Convert to fraction form
    1,640.96/2,265.60 = 1,116.80/x
  3. Step 3: Cross multiply
    1,640.96x = 2,265.60 × 1,116.80
  4. Step 4: Simplify right side
    1,640.96x = 2,530,222.08
  5. Step 5: Solve for x
    x = 2,530,222.08/1,640.96
  6. Step 6: Final answer
    x = 1,541.92

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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.