Home / 2,086.84-2,880.17-1,247.28

Finding the Fourth Proportional to 2,086.84, 2,880.17 and 1,247.28

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Solution

The fourth proportional to 2,086.84, 2,880.17 and 1,247.28 is: 1,721.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,086.84 : 2,880.17 = 1,247.28 : x
  2. Step 2: Convert to fraction form
    2,086.84/2,880.17 = 1,247.28/x
  3. Step 3: Cross multiply
    2,086.84x = 2,880.17 × 1,247.28
  4. Step 4: Simplify right side
    2,086.84x = 3,592,378.44
  5. Step 5: Solve for x
    x = 3,592,378.44/2,086.84
  6. Step 6: Final answer
    x = 1,721.44

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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.