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Finding the Fourth Proportional to 1,639.44, 2,262.48 and 940.80

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Solution

The fourth proportional to 1,639.44, 2,262.48 and 940.80 is: 1,298.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.44 : 2,262.48 = 940.80 : x
  2. Step 2: Convert to fraction form
    1,639.44/2,262.48 = 940.80/x
  3. Step 3: Cross multiply
    1,639.44x = 2,262.48 × 940.80
  4. Step 4: Simplify right side
    1,639.44x = 2,128,541.18
  5. Step 5: Solve for x
    x = 2,128,541.18/1,639.44
  6. Step 6: Final answer
    x = 1,298.33

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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.