Home / 1,913.15-2,869.71-1,091.81

Finding the Fourth Proportional to 1,913.15, 2,869.71 and 1,091.81

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Solution

The fourth proportional to 1,913.15, 2,869.71 and 1,091.81 is: 1,637.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.15 : 2,869.71 = 1,091.81 : x
  2. Step 2: Convert to fraction form
    1,913.15/2,869.71 = 1,091.81/x
  3. Step 3: Cross multiply
    1,913.15x = 2,869.71 × 1,091.81
  4. Step 4: Simplify right side
    1,913.15x = 3,133,163.73
  5. Step 5: Solve for x
    x = 3,133,163.73/1,913.15
  6. Step 6: Final answer
    x = 1,637.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.