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Finding the Fourth Proportional to 1,686.32, 2,326.98 and 940.22

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Solution

The fourth proportional to 1,686.32, 2,326.98 and 940.22 is: 1,297.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.32 : 2,326.98 = 940.22 : x
  2. Step 2: Convert to fraction form
    1,686.32/2,326.98 = 940.22/x
  3. Step 3: Cross multiply
    1,686.32x = 2,326.98 × 940.22
  4. Step 4: Simplify right side
    1,686.32x = 2,187,873.14
  5. Step 5: Solve for x
    x = 2,187,873.14/1,686.32
  6. Step 6: Final answer
    x = 1,297.42

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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.