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Finding the Fourth Proportional to 696.48, 1,039.08 and 633.60

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Solution

The fourth proportional to 696.48, 1,039.08 and 633.60 is: 945.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.48 : 1,039.08 = 633.60 : x
  2. Step 2: Convert to fraction form
    696.48/1,039.08 = 633.60/x
  3. Step 3: Cross multiply
    696.48x = 1,039.08 × 633.60
  4. Step 4: Simplify right side
    696.48x = 658,361.09
  5. Step 5: Solve for x
    x = 658,361.09/696.48
  6. Step 6: Final answer
    x = 945.27

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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.