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Finding the Fourth Proportional to 1,686.13, 2,326.59 and 940.07

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Solution

The fourth proportional to 1,686.13, 2,326.59 and 940.07 is: 1,297.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.13 : 2,326.59 = 940.07 : x
  2. Step 2: Convert to fraction form
    1,686.13/2,326.59 = 940.07/x
  3. Step 3: Cross multiply
    1,686.13x = 2,326.59 × 940.07
  4. Step 4: Simplify right side
    1,686.13x = 2,187,157.46
  5. Step 5: Solve for x
    x = 2,187,157.46/1,686.13
  6. Step 6: Final answer
    x = 1,297.15

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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.