Home / 1,922.11-2,650.39-1,389.94

Finding the Fourth Proportional to 1,922.11, 2,650.39 and 1,389.94

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Solution

The fourth proportional to 1,922.11, 2,650.39 and 1,389.94 is: 1,916.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,922.11 : 2,650.39 = 1,389.94 : x
  2. Step 2: Convert to fraction form
    1,922.11/2,650.39 = 1,389.94/x
  3. Step 3: Cross multiply
    1,922.11x = 2,650.39 × 1,389.94
  4. Step 4: Simplify right side
    1,922.11x = 3,683,869.82
  5. Step 5: Solve for x
    x = 3,683,869.82/1,922.11
  6. Step 6: Final answer
    x = 1,916.58

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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.