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Finding the Fourth Proportional to 1,375.11, 1,898.08 and 927.63

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Solution

The fourth proportional to 1,375.11, 1,898.08 and 927.63 is: 1,280.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375.11 : 1,898.08 = 927.63 : x
  2. Step 2: Convert to fraction form
    1,375.11/1,898.08 = 927.63/x
  3. Step 3: Cross multiply
    1,375.11x = 1,898.08 × 927.63
  4. Step 4: Simplify right side
    1,375.11x = 1,760,713.55
  5. Step 5: Solve for x
    x = 1,760,713.55/1,375.11
  6. Step 6: Final answer
    x = 1,280.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.