Home / 1,292.73-1,939.23-427.11

Finding the Fourth Proportional to 1,292.73, 1,939.23 and 427.11

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Solution

The fourth proportional to 1,292.73, 1,939.23 and 427.11 is: 640.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.73 : 1,939.23 = 427.11 : x
  2. Step 2: Convert to fraction form
    1,292.73/1,939.23 = 427.11/x
  3. Step 3: Cross multiply
    1,292.73x = 1,939.23 × 427.11
  4. Step 4: Simplify right side
    1,292.73x = 828,264.53
  5. Step 5: Solve for x
    x = 828,264.53/1,292.73
  6. Step 6: Final answer
    x = 640.71

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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.