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Finding the Fourth Proportional to 665.97, 998.04 and 422.06

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Solution

The fourth proportional to 665.97, 998.04 and 422.06 is: 632.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.97 : 998.04 = 422.06 : x
  2. Step 2: Convert to fraction form
    665.97/998.04 = 422.06/x
  3. Step 3: Cross multiply
    665.97x = 998.04 × 422.06
  4. Step 4: Simplify right side
    665.97x = 421,227.77
  5. Step 5: Solve for x
    x = 421,227.77/665.97
  6. Step 6: Final answer
    x = 632.50

Related Problems

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Double scale
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Similar ratio
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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.