Home / 1,989.96-2,746.08-1,105.68

Finding the Fourth Proportional to 1,989.96, 2,746.08 and 1,105.68

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Solution

The fourth proportional to 1,989.96, 2,746.08 and 1,105.68 is: 1,525.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.96 : 2,746.08 = 1,105.68 : x
  2. Step 2: Convert to fraction form
    1,989.96/2,746.08 = 1,105.68/x
  3. Step 3: Cross multiply
    1,989.96x = 2,746.08 × 1,105.68
  4. Step 4: Simplify right side
    1,989.96x = 3,036,285.73
  5. Step 5: Solve for x
    x = 3,036,285.73/1,989.96
  6. Step 6: Final answer
    x = 1,525.80

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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.