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Finding the Fourth Proportional to 631.11, 944.61 and 447.93

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Solution

The fourth proportional to 631.11, 944.61 and 447.93 is: 670.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.11 : 944.61 = 447.93 : x
  2. Step 2: Convert to fraction form
    631.11/944.61 = 447.93/x
  3. Step 3: Cross multiply
    631.11x = 944.61 × 447.93
  4. Step 4: Simplify right side
    631.11x = 423,119.16
  5. Step 5: Solve for x
    x = 423,119.16/631.11
  6. Step 6: Final answer
    x = 670.44

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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.