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Finding the Fourth Proportional to 969.14, 1,453.71 and 645.14

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Solution

The fourth proportional to 969.14, 1,453.71 and 645.14 is: 967.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.14 : 1,453.71 = 645.14 : x
  2. Step 2: Convert to fraction form
    969.14/1,453.71 = 645.14/x
  3. Step 3: Cross multiply
    969.14x = 1,453.71 × 645.14
  4. Step 4: Simplify right side
    969.14x = 937,846.47
  5. Step 5: Solve for x
    x = 937,846.47/969.14
  6. Step 6: Final answer
    x = 967.71

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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.