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Finding the Fourth Proportional to 685.33, 945.27 and 498.49

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Solution

The fourth proportional to 685.33, 945.27 and 498.49 is: 687.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    685.33 : 945.27 = 498.49 : x
  2. Step 2: Convert to fraction form
    685.33/945.27 = 498.49/x
  3. Step 3: Cross multiply
    685.33x = 945.27 × 498.49
  4. Step 4: Simplify right side
    685.33x = 471,205.28
  5. Step 5: Solve for x
    x = 471,205.28/685.33
  6. Step 6: Final answer
    x = 687.56

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Double scale
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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.