Home / 1,949.76-2,689.66-1,320.32

Finding the Fourth Proportional to 1,949.76, 2,689.66 and 1,320.32

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Solution

The fourth proportional to 1,949.76, 2,689.66 and 1,320.32 is: 1,821.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,949.76 : 2,689.66 = 1,320.32 : x
  2. Step 2: Convert to fraction form
    1,949.76/2,689.66 = 1,320.32/x
  3. Step 3: Cross multiply
    1,949.76x = 2,689.66 × 1,320.32
  4. Step 4: Simplify right side
    1,949.76x = 3,551,211.89
  5. Step 5: Solve for x
    x = 3,551,211.89/1,949.76
  6. Step 6: Final answer
    x = 1,821.36

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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.