Home / 1,685.14-2,325.42-939.09

Finding the Fourth Proportional to 1,685.14, 2,325.42 and 939.09

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Solution

The fourth proportional to 1,685.14, 2,325.42 and 939.09 is: 1,295.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,685.14 : 2,325.42 = 939.09 : x
  2. Step 2: Convert to fraction form
    1,685.14/2,325.42 = 939.09/x
  3. Step 3: Cross multiply
    1,685.14x = 2,325.42 × 939.09
  4. Step 4: Simplify right side
    1,685.14x = 2,183,778.67
  5. Step 5: Solve for x
    x = 2,183,778.67/1,685.14
  6. Step 6: Final answer
    x = 1,295.90

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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.