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Finding the Fourth Proportional to 665.49, 998.77 and 254.94

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Solution

The fourth proportional to 665.49, 998.77 and 254.94 is: 382.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.49 : 998.77 = 254.94 : x
  2. Step 2: Convert to fraction form
    665.49/998.77 = 254.94/x
  3. Step 3: Cross multiply
    665.49x = 998.77 × 254.94
  4. Step 4: Simplify right side
    665.49x = 254,626.42
  5. Step 5: Solve for x
    x = 254,626.42/665.49
  6. Step 6: Final answer
    x = 382.61

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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.