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Finding the Fourth Proportional to 674.73, 931.12 and 379.99

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Solution

The fourth proportional to 674.73, 931.12 and 379.99 is: 524.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.73 : 931.12 = 379.99 : x
  2. Step 2: Convert to fraction form
    674.73/931.12 = 379.99/x
  3. Step 3: Cross multiply
    674.73x = 931.12 × 379.99
  4. Step 4: Simplify right side
    674.73x = 353,817.57
  5. Step 5: Solve for x
    x = 353,817.57/674.73
  6. Step 6: Final answer
    x = 524.38

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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.