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Finding the Fourth Proportional to 2,688.75, 4,033.28 and 957.38

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Solution

The fourth proportional to 2,688.75, 4,033.28 and 957.38 is: 1,436.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.75 : 4,033.28 = 957.38 : x
  2. Step 2: Convert to fraction form
    2,688.75/4,033.28 = 957.38/x
  3. Step 3: Cross multiply
    2,688.75x = 4,033.28 × 957.38
  4. Step 4: Simplify right side
    2,688.75x = 3,861,358.45
  5. Step 5: Solve for x
    x = 3,861,358.45/2,688.75
  6. Step 6: Final answer
    x = 1,436.12

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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.