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Finding the Fourth Proportional to 631.12, 946.79 and 198.25

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Solution

The fourth proportional to 631.12, 946.79 and 198.25 is: 297.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.12 : 946.79 = 198.25 : x
  2. Step 2: Convert to fraction form
    631.12/946.79 = 198.25/x
  3. Step 3: Cross multiply
    631.12x = 946.79 × 198.25
  4. Step 4: Simplify right side
    631.12x = 187,700.13
  5. Step 5: Solve for x
    x = 187,700.13/631.12
  6. Step 6: Final answer
    x = 297.41

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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.