Home / 2,137.92-2,949.80-1,206.40

Finding the Fourth Proportional to 2,137.92, 2,949.80 and 1,206.40

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Solution

The fourth proportional to 2,137.92, 2,949.80 and 1,206.40 is: 1,664.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,137.92 : 2,949.80 = 1,206.40 : x
  2. Step 2: Convert to fraction form
    2,137.92/2,949.80 = 1,206.40/x
  3. Step 3: Cross multiply
    2,137.92x = 2,949.80 × 1,206.40
  4. Step 4: Simplify right side
    2,137.92x = 3,558,638.72
  5. Step 5: Solve for x
    x = 3,558,638.72/2,137.92
  6. Step 6: Final answer
    x = 1,664.53

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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.