Home / 2,269.92-3,131.94-1,385.40

Finding the Fourth Proportional to 2,269.92, 3,131.94 and 1,385.40

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Solution

The fourth proportional to 2,269.92, 3,131.94 and 1,385.40 is: 1,911.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,269.92 : 3,131.94 = 1,385.40 : x
  2. Step 2: Convert to fraction form
    2,269.92/3,131.94 = 1,385.40/x
  3. Step 3: Cross multiply
    2,269.92x = 3,131.94 × 1,385.40
  4. Step 4: Simplify right side
    2,269.92x = 4,338,989.68
  5. Step 5: Solve for x
    x = 4,338,989.68/2,269.92
  6. Step 6: Final answer
    x = 1,911.52

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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.