Home / 2,389.28-3,296.49-1,643

Finding the Fourth Proportional to 2,389.28, 3,296.49 and 1,643

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Solution

The fourth proportional to 2,389.28, 3,296.49 and 1,643 is: 2,266.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,389.28 : 3,296.49 = 1,643 : x
  2. Step 2: Convert to fraction form
    2,389.28/3,296.49 = 1,643/x
  3. Step 3: Cross multiply
    2,389.28x = 3,296.49 × 1,643
  4. Step 4: Simplify right side
    2,389.28x = 5,416,133.07
  5. Step 5: Solve for x
    x = 5,416,133.07/2,389.28
  6. Step 6: Final answer
    x = 2,266.85

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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.