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Finding the Fourth Proportional to 631.21, 946.71 and 169

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Solution

The fourth proportional to 631.21, 946.71 and 169 is: 253.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.21 : 946.71 = 169 : x
  2. Step 2: Convert to fraction form
    631.21/946.71 = 169/x
  3. Step 3: Cross multiply
    631.21x = 946.71 × 169
  4. Step 4: Simplify right side
    631.21x = 159,993.99
  5. Step 5: Solve for x
    x = 159,993.99/631.21
  6. Step 6: Final answer
    x = 253.47

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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.