Home / 1,685.36-2,325.85-939.29

Finding the Fourth Proportional to 1,685.36, 2,325.85 and 939.29

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Solution

The fourth proportional to 1,685.36, 2,325.85 and 939.29 is: 1,296.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,685.36 : 2,325.85 = 939.29 : x
  2. Step 2: Convert to fraction form
    1,685.36/2,325.85 = 939.29/x
  3. Step 3: Cross multiply
    1,685.36x = 2,325.85 × 939.29
  4. Step 4: Simplify right side
    1,685.36x = 2,184,633.67
  5. Step 5: Solve for x
    x = 2,184,633.67/1,685.36
  6. Step 6: Final answer
    x = 1,296.25

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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.