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Finding the Fourth Proportional to 969.75, 1,455.53 and 754.69

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Solution

The fourth proportional to 969.75, 1,455.53 and 754.69 is: 1,132.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.75 : 1,455.53 = 754.69 : x
  2. Step 2: Convert to fraction form
    969.75/1,455.53 = 754.69/x
  3. Step 3: Cross multiply
    969.75x = 1,455.53 × 754.69
  4. Step 4: Simplify right side
    969.75x = 1,098,473.94
  5. Step 5: Solve for x
    x = 1,098,473.94/969.75
  6. Step 6: Final answer
    x = 1,132.74

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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.