Home / 1,916.87-2,645.21-1,172.07

Finding the Fourth Proportional to 1,916.87, 2,645.21 and 1,172.07

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Solution

The fourth proportional to 1,916.87, 2,645.21 and 1,172.07 is: 1,617.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,916.87 : 2,645.21 = 1,172.07 : x
  2. Step 2: Convert to fraction form
    1,916.87/2,645.21 = 1,172.07/x
  3. Step 3: Cross multiply
    1,916.87x = 2,645.21 × 1,172.07
  4. Step 4: Simplify right side
    1,916.87x = 3,100,367.62
  5. Step 5: Solve for x
    x = 3,100,367.62/1,916.87
  6. Step 6: Final answer
    x = 1,617.42

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1.5x scale

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.