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Finding the Fourth Proportional to 665.04, 997.99 and 254.23

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Solution

The fourth proportional to 665.04, 997.99 and 254.23 is: 381.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.04 : 997.99 = 254.23 : x
  2. Step 2: Convert to fraction form
    665.04/997.99 = 254.23/x
  3. Step 3: Cross multiply
    665.04x = 997.99 × 254.23
  4. Step 4: Simplify right side
    665.04x = 253,715.87
  5. Step 5: Solve for x
    x = 253,715.87/665.04
  6. Step 6: Final answer
    x = 381.50

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.