Home / 1,916.62-2,638.46-1,720.06

Finding the Fourth Proportional to 1,916.62, 2,638.46 and 1,720.06

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Solution

The fourth proportional to 1,916.62, 2,638.46 and 1,720.06 is: 2,367.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,916.62 : 2,638.46 = 1,720.06 : x
  2. Step 2: Convert to fraction form
    1,916.62/2,638.46 = 1,720.06/x
  3. Step 3: Cross multiply
    1,916.62x = 2,638.46 × 1,720.06
  4. Step 4: Simplify right side
    1,916.62x = 4,538,309.51
  5. Step 5: Solve for x
    x = 4,538,309.51/1,916.62
  6. Step 6: Final answer
    x = 2,367.87

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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.