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Finding the Fourth Proportional to 683.44, 1,020.10 and 635.28

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Solution

The fourth proportional to 683.44, 1,020.10 and 635.28 is: 948.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.44 : 1,020.10 = 635.28 : x
  2. Step 2: Convert to fraction form
    683.44/1,020.10 = 635.28/x
  3. Step 3: Cross multiply
    683.44x = 1,020.10 × 635.28
  4. Step 4: Simplify right side
    683.44x = 648,049.13
  5. Step 5: Solve for x
    x = 648,049.13/683.44
  6. Step 6: Final answer
    x = 948.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.