Home / 1,685.15-2,325.29-939.05

Finding the Fourth Proportional to 1,685.15, 2,325.29 and 939.05

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Solution

The fourth proportional to 1,685.15, 2,325.29 and 939.05 is: 1,295.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,685.15 : 2,325.29 = 939.05 : x
  2. Step 2: Convert to fraction form
    1,685.15/2,325.29 = 939.05/x
  3. Step 3: Cross multiply
    1,685.15x = 2,325.29 × 939.05
  4. Step 4: Simplify right side
    1,685.15x = 2,183,558.88
  5. Step 5: Solve for x
    x = 2,183,558.88/1,685.15
  6. Step 6: Final answer
    x = 1,295.77

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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.