Home / 1,685.46-2,325.80-939.60

Finding the Fourth Proportional to 1,685.46, 2,325.80 and 939.60

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Solution

The fourth proportional to 1,685.46, 2,325.80 and 939.60 is: 1,296.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,685.46 : 2,325.80 = 939.60 : x
  2. Step 2: Convert to fraction form
    1,685.46/2,325.80 = 939.60/x
  3. Step 3: Cross multiply
    1,685.46x = 2,325.80 × 939.60
  4. Step 4: Simplify right side
    1,685.46x = 2,185,316.98
  5. Step 5: Solve for x
    x = 2,185,316.98/1,685.46
  6. Step 6: Final answer
    x = 1,296.57

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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.