Home / 1,911.49-2,867.65-613.87

Finding the Fourth Proportional to 1,911.49, 2,867.65 and 613.87

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Solution

The fourth proportional to 1,911.49, 2,867.65 and 613.87 is: 920.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.49 : 2,867.65 = 613.87 : x
  2. Step 2: Convert to fraction form
    1,911.49/2,867.65 = 613.87/x
  3. Step 3: Cross multiply
    1,911.49x = 2,867.65 × 613.87
  4. Step 4: Simplify right side
    1,911.49x = 1,760,371.73
  5. Step 5: Solve for x
    x = 1,760,371.73/1,911.49
  6. Step 6: Final answer
    x = 920.94

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1.5x scale

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.