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Finding the Fourth Proportional to 685.04, 945.32 and 374.48

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Solution

The fourth proportional to 685.04, 945.32 and 374.48 is: 516.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    685.04 : 945.32 = 374.48 : x
  2. Step 2: Convert to fraction form
    685.04/945.32 = 374.48/x
  3. Step 3: Cross multiply
    685.04x = 945.32 × 374.48
  4. Step 4: Simplify right side
    685.04x = 354,003.43
  5. Step 5: Solve for x
    x = 354,003.43/685.04
  6. Step 6: Final answer
    x = 516.76

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Double scale
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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.