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Finding the Fourth Proportional to 685.44, 1,025.42 and 607.53

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Solution

The fourth proportional to 685.44, 1,025.42 and 607.53 is: 908.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    685.44 : 1,025.42 = 607.53 : x
  2. Step 2: Convert to fraction form
    685.44/1,025.42 = 607.53/x
  3. Step 3: Cross multiply
    685.44x = 1,025.42 × 607.53
  4. Step 4: Simplify right side
    685.44x = 622,973.41
  5. Step 5: Solve for x
    x = 622,973.41/685.44
  6. Step 6: Final answer
    x = 908.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.