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Finding the Fourth Proportional to 631.36, 946.96 and 169.18

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Solution

The fourth proportional to 631.36, 946.96 and 169.18 is: 253.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.36 : 946.96 = 169.18 : x
  2. Step 2: Convert to fraction form
    631.36/946.96 = 169.18/x
  3. Step 3: Cross multiply
    631.36x = 946.96 × 169.18
  4. Step 4: Simplify right side
    631.36x = 160,206.69
  5. Step 5: Solve for x
    x = 160,206.69/631.36
  6. Step 6: Final answer
    x = 253.75

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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.