Home / 1,685.69-2,326.29-939.73

Finding the Fourth Proportional to 1,685.69, 2,326.29 and 939.73

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Solution

The fourth proportional to 1,685.69, 2,326.29 and 939.73 is: 1,296.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,685.69 : 2,326.29 = 939.73 : x
  2. Step 2: Convert to fraction form
    1,685.69/2,326.29 = 939.73/x
  3. Step 3: Cross multiply
    1,685.69x = 2,326.29 × 939.73
  4. Step 4: Simplify right side
    1,685.69x = 2,186,072.87
  5. Step 5: Solve for x
    x = 2,186,072.87/1,685.69
  6. Step 6: Final answer
    x = 1,296.84

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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.