Home / 2,813.17-4,219.73-939.20

Finding the Fourth Proportional to 2,813.17, 4,219.73 and 939.20

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Solution

The fourth proportional to 2,813.17, 4,219.73 and 939.20 is: 1,408.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,813.17 : 4,219.73 = 939.20 : x
  2. Step 2: Convert to fraction form
    2,813.17/4,219.73 = 939.20/x
  3. Step 3: Cross multiply
    2,813.17x = 4,219.73 × 939.20
  4. Step 4: Simplify right side
    2,813.17x = 3,963,176.27
  5. Step 5: Solve for x
    x = 3,963,176.27/2,813.17
  6. Step 6: Final answer
    x = 1,408.79

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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.