Home / 1,989.87-2,746.07-1,105.76

Finding the Fourth Proportional to 1,989.87, 2,746.07 and 1,105.76

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Solution

The fourth proportional to 1,989.87, 2,746.07 and 1,105.76 is: 1,525.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.87 : 2,746.07 = 1,105.76 : x
  2. Step 2: Convert to fraction form
    1,989.87/2,746.07 = 1,105.76/x
  3. Step 3: Cross multiply
    1,989.87x = 2,746.07 × 1,105.76
  4. Step 4: Simplify right side
    1,989.87x = 3,036,475.10
  5. Step 5: Solve for x
    x = 3,036,475.10/1,989.87
  6. Step 6: Final answer
    x = 1,525.97

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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.