Home / 2,106.68-3,160.14-645.84

Finding the Fourth Proportional to 2,106.68, 3,160.14 and 645.84

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Solution

The fourth proportional to 2,106.68, 3,160.14 and 645.84 is: 968.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,106.68 : 3,160.14 = 645.84 : x
  2. Step 2: Convert to fraction form
    2,106.68/3,160.14 = 645.84/x
  3. Step 3: Cross multiply
    2,106.68x = 3,160.14 × 645.84
  4. Step 4: Simplify right side
    2,106.68x = 2,040,944.82
  5. Step 5: Solve for x
    x = 2,040,944.82/2,106.68
  6. Step 6: Final answer
    x = 968.80

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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.