Home / 3,107.36-4,288.80-1,929.20

Finding the Fourth Proportional to 3,107.36, 4,288.80 and 1,929.20

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Solution

The fourth proportional to 3,107.36, 4,288.80 and 1,929.20 is: 2,662.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.36 : 4,288.80 = 1,929.20 : x
  2. Step 2: Convert to fraction form
    3,107.36/4,288.80 = 1,929.20/x
  3. Step 3: Cross multiply
    3,107.36x = 4,288.80 × 1,929.20
  4. Step 4: Simplify right side
    3,107.36x = 8,273,952.96
  5. Step 5: Solve for x
    x = 8,273,952.96/3,107.36
  6. Step 6: Final answer
    x = 2,662.70

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1.5x scale

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.