Home / 2,106.89-3,160.62-646.19

Finding the Fourth Proportional to 2,106.89, 3,160.62 and 646.19

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Solution

The fourth proportional to 2,106.89, 3,160.62 and 646.19 is: 969.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,106.89 : 3,160.62 = 646.19 : x
  2. Step 2: Convert to fraction form
    2,106.89/3,160.62 = 646.19/x
  3. Step 3: Cross multiply
    2,106.89x = 3,160.62 × 646.19
  4. Step 4: Simplify right side
    2,106.89x = 2,042,361.04
  5. Step 5: Solve for x
    x = 2,042,361.04/2,106.89
  6. Step 6: Final answer
    x = 969.37

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1.5x scale

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.