Home / 2,921.13-4,381.68-1,277.80

Finding the Fourth Proportional to 2,921.13, 4,381.68 and 1,277.80

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Solution

The fourth proportional to 2,921.13, 4,381.68 and 1,277.80 is: 1,916.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.13 : 4,381.68 = 1,277.80 : x
  2. Step 2: Convert to fraction form
    2,921.13/4,381.68 = 1,277.80/x
  3. Step 3: Cross multiply
    2,921.13x = 4,381.68 × 1,277.80
  4. Step 4: Simplify right side
    2,921.13x = 5,598,910.70
  5. Step 5: Solve for x
    x = 5,598,910.70/2,921.13
  6. Step 6: Final answer
    x = 1,916.69

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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.