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Finding the Fourth Proportional to 674.92, 931.44 and 395.18

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Solution

The fourth proportional to 674.92, 931.44 and 395.18 is: 545.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.92 : 931.44 = 395.18 : x
  2. Step 2: Convert to fraction form
    674.92/931.44 = 395.18/x
  3. Step 3: Cross multiply
    674.92x = 931.44 × 395.18
  4. Step 4: Simplify right side
    674.92x = 368,086.46
  5. Step 5: Solve for x
    x = 368,086.46/674.92
  6. Step 6: Final answer
    x = 545.38

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Half scale
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Double scale
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Similar ratio
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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.