Home / 1,685.73-2,326.40-939.67

Finding the Fourth Proportional to 1,685.73, 2,326.40 and 939.67

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Solution

The fourth proportional to 1,685.73, 2,326.40 and 939.67 is: 1,296.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,685.73 : 2,326.40 = 939.67 : x
  2. Step 2: Convert to fraction form
    1,685.73/2,326.40 = 939.67/x
  3. Step 3: Cross multiply
    1,685.73x = 2,326.40 × 939.67
  4. Step 4: Simplify right side
    1,685.73x = 2,186,048.29
  5. Step 5: Solve for x
    x = 2,186,048.29/1,685.73
  6. Step 6: Final answer
    x = 1,296.80

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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.