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Finding the Fourth Proportional to 901.28, 1,244.13 and 680.29

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Solution

The fourth proportional to 901.28, 1,244.13 and 680.29 is: 939.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.28 : 1,244.13 = 680.29 : x
  2. Step 2: Convert to fraction form
    901.28/1,244.13 = 680.29/x
  3. Step 3: Cross multiply
    901.28x = 1,244.13 × 680.29
  4. Step 4: Simplify right side
    901.28x = 846,362.98
  5. Step 5: Solve for x
    x = 846,362.98/901.28
  6. Step 6: Final answer
    x = 939.07

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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.