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Finding the Fourth Proportional to 927.75, 1,389.60 and 668.26

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Solution

The fourth proportional to 927.75, 1,389.60 and 668.26 is: 1,000.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.75 : 1,389.60 = 668.26 : x
  2. Step 2: Convert to fraction form
    927.75/1,389.60 = 668.26/x
  3. Step 3: Cross multiply
    927.75x = 1,389.60 × 668.26
  4. Step 4: Simplify right side
    927.75x = 928,614.10
  5. Step 5: Solve for x
    x = 928,614.10/927.75
  6. Step 6: Final answer
    x = 1,000.93

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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.