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Finding the Fourth Proportional to 927.49, 1,387.99 and 683.41

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Solution

The fourth proportional to 927.49, 1,387.99 and 683.41 is: 1,022.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.49 : 1,387.99 = 683.41 : x
  2. Step 2: Convert to fraction form
    927.49/1,387.99 = 683.41/x
  3. Step 3: Cross multiply
    927.49x = 1,387.99 × 683.41
  4. Step 4: Simplify right side
    927.49x = 948,566.25
  5. Step 5: Solve for x
    x = 948,566.25/927.49
  6. Step 6: Final answer
    x = 1,022.72

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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.