Home / 1,686.04-2,326.90-939.94

Finding the Fourth Proportional to 1,686.04, 2,326.90 and 939.94

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Solution

The fourth proportional to 1,686.04, 2,326.90 and 939.94 is: 1,297.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.04 : 2,326.90 = 939.94 : x
  2. Step 2: Convert to fraction form
    1,686.04/2,326.90 = 939.94/x
  3. Step 3: Cross multiply
    1,686.04x = 2,326.90 × 939.94
  4. Step 4: Simplify right side
    1,686.04x = 2,187,146.39
  5. Step 5: Solve for x
    x = 2,187,146.39/1,686.04
  6. Step 6: Final answer
    x = 1,297.21

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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.