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Finding the Fourth Proportional to 1,382.48, 1,908.14 and 940.56

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Solution

The fourth proportional to 1,382.48, 1,908.14 and 940.56 is: 1,298.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,382.48 : 1,908.14 = 940.56 : x
  2. Step 2: Convert to fraction form
    1,382.48/1,908.14 = 940.56/x
  3. Step 3: Cross multiply
    1,382.48x = 1,908.14 × 940.56
  4. Step 4: Simplify right side
    1,382.48x = 1,794,720.16
  5. Step 5: Solve for x
    x = 1,794,720.16/1,382.48
  6. Step 6: Final answer
    x = 1,298.19

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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.