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Finding the Fourth Proportional to 631.93, 947.91 and 193.19

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Solution

The fourth proportional to 631.93, 947.91 and 193.19 is: 289.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.93 : 947.91 = 193.19 : x
  2. Step 2: Convert to fraction form
    631.93/947.91 = 193.19/x
  3. Step 3: Cross multiply
    631.93x = 947.91 × 193.19
  4. Step 4: Simplify right side
    631.93x = 183,126.73
  5. Step 5: Solve for x
    x = 183,126.73/631.93
  6. Step 6: Final answer
    x = 289.79

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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.