Home / 1,292.77-1,939.12-415.27

Finding the Fourth Proportional to 1,292.77, 1,939.12 and 415.27

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Solution

The fourth proportional to 1,292.77, 1,939.12 and 415.27 is: 622.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.77 : 1,939.12 = 415.27 : x
  2. Step 2: Convert to fraction form
    1,292.77/1,939.12 = 415.27/x
  3. Step 3: Cross multiply
    1,292.77x = 1,939.12 × 415.27
  4. Step 4: Simplify right side
    1,292.77x = 805,262.08
  5. Step 5: Solve for x
    x = 805,262.08/1,292.77
  6. Step 6: Final answer
    x = 622.90

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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.