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Finding the Fourth Proportional to 631.09, 946.61 and 168.86

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Solution

The fourth proportional to 631.09, 946.61 and 168.86 is: 253.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.09 : 946.61 = 168.86 : x
  2. Step 2: Convert to fraction form
    631.09/946.61 = 168.86/x
  3. Step 3: Cross multiply
    631.09x = 946.61 × 168.86
  4. Step 4: Simplify right side
    631.09x = 159,843.72
  5. Step 5: Solve for x
    x = 159,843.72/631.09
  6. Step 6: Final answer
    x = 253.28

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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.