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Finding the Fourth Proportional to 997.14, 1,495.67 and 381.14

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Solution

The fourth proportional to 997.14, 1,495.67 and 381.14 is: 571.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    997.14 : 1,495.67 = 381.14 : x
  2. Step 2: Convert to fraction form
    997.14/1,495.67 = 381.14/x
  3. Step 3: Cross multiply
    997.14x = 1,495.67 × 381.14
  4. Step 4: Simplify right side
    997.14x = 570,050.28
  5. Step 5: Solve for x
    x = 570,050.28/997.14
  6. Step 6: Final answer
    x = 571.69

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Double scale
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1.5x scale

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.