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Finding the Fourth Proportional to 1,427.86, 1,969.87 and 930.92

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Solution

The fourth proportional to 1,427.86, 1,969.87 and 930.92 is: 1,284.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.86 : 1,969.87 = 930.92 : x
  2. Step 2: Convert to fraction form
    1,427.86/1,969.87 = 930.92/x
  3. Step 3: Cross multiply
    1,427.86x = 1,969.87 × 930.92
  4. Step 4: Simplify right side
    1,427.86x = 1,833,791.38
  5. Step 5: Solve for x
    x = 1,833,791.38/1,427.86
  6. Step 6: Final answer
    x = 1,284.29

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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.