Home / 1,685.96-2,326.54-939.88

Finding the Fourth Proportional to 1,685.96, 2,326.54 and 939.88

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Solution

The fourth proportional to 1,685.96, 2,326.54 and 939.88 is: 1,296.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,685.96 : 2,326.54 = 939.88 : x
  2. Step 2: Convert to fraction form
    1,685.96/2,326.54 = 939.88/x
  3. Step 3: Cross multiply
    1,685.96x = 2,326.54 × 939.88
  4. Step 4: Simplify right side
    1,685.96x = 2,186,668.42
  5. Step 5: Solve for x
    x = 2,186,668.42/1,685.96
  6. Step 6: Final answer
    x = 1,296.99

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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.