Home / 1,686.15-2,326.61-939.95

Finding the Fourth Proportional to 1,686.15, 2,326.61 and 939.95

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Solution

The fourth proportional to 1,686.15, 2,326.61 and 939.95 is: 1,296.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.15 : 2,326.61 = 939.95 : x
  2. Step 2: Convert to fraction form
    1,686.15/2,326.61 = 939.95/x
  3. Step 3: Cross multiply
    1,686.15x = 2,326.61 × 939.95
  4. Step 4: Simplify right side
    1,686.15x = 2,186,880.74
  5. Step 5: Solve for x
    x = 2,186,880.74/1,686.15
  6. Step 6: Final answer
    x = 1,296.97

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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.