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Finding the Fourth Proportional to 1,686.64, 2,327.43 and 940.54

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Solution

The fourth proportional to 1,686.64, 2,327.43 and 940.54 is: 1,297.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.64 : 2,327.43 = 940.54 : x
  2. Step 2: Convert to fraction form
    1,686.64/2,327.43 = 940.54/x
  3. Step 3: Cross multiply
    1,686.64x = 2,327.43 × 940.54
  4. Step 4: Simplify right side
    1,686.64x = 2,189,041.01
  5. Step 5: Solve for x
    x = 2,189,041.01/1,686.64
  6. Step 6: Final answer
    x = 1,297.87

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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.