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Finding the Fourth Proportional to 631.35, 947.00 and 198.52

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Solution

The fourth proportional to 631.35, 947.00 and 198.52 is: 297.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.35 : 947.00 = 198.52 : x
  2. Step 2: Convert to fraction form
    631.35/947.00 = 198.52/x
  3. Step 3: Cross multiply
    631.35x = 947.00 × 198.52
  4. Step 4: Simplify right side
    631.35x = 187,996.57
  5. Step 5: Solve for x
    x = 187,996.57/631.35
  6. Step 6: Final answer
    x = 297.77

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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.