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Finding the Fourth Proportional to 1,682.81, 2,321.93 and 984.05

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Solution

The fourth proportional to 1,682.81, 2,321.93 and 984.05 is: 1,357.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,682.81 : 2,321.93 = 984.05 : x
  2. Step 2: Convert to fraction form
    1,682.81/2,321.93 = 984.05/x
  3. Step 3: Cross multiply
    1,682.81x = 2,321.93 × 984.05
  4. Step 4: Simplify right side
    1,682.81x = 2,284,895.22
  5. Step 5: Solve for x
    x = 2,284,895.22/1,682.81
  6. Step 6: Final answer
    x = 1,357.79

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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.