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Finding the Fourth Proportional to 631.15, 946.82 and 198.31

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Solution

The fourth proportional to 631.15, 946.82 and 198.31 is: 297.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.15 : 946.82 = 198.31 : x
  2. Step 2: Convert to fraction form
    631.15/946.82 = 198.31/x
  3. Step 3: Cross multiply
    631.15x = 946.82 × 198.31
  4. Step 4: Simplify right side
    631.15x = 187,758.15
  5. Step 5: Solve for x
    x = 187,758.15/631.15
  6. Step 6: Final answer
    x = 297.49

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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.