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Finding the Fourth Proportional to 631, 946.39 and 220.14

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Solution

The fourth proportional to 631, 946.39 and 220.14 is: 330.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    631 : 946.39 = 220.14 : x
  2. Step 2: Convert to fraction form
    631/946.39 = 220.14/x
  3. Step 3: Cross multiply
    631x = 946.39 × 220.14
  4. Step 4: Simplify right side
    631x = 208,338.29
  5. Step 5: Solve for x
    x = 208,338.29/631
  6. Step 6: Final answer
    x = 330.17

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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.