Home / 1,979.40-2,729.34-1,685.64

Finding the Fourth Proportional to 1,979.40, 2,729.34 and 1,685.64

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Solution

The fourth proportional to 1,979.40, 2,729.34 and 1,685.64 is: 2,324.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.40 : 2,729.34 = 1,685.64 : x
  2. Step 2: Convert to fraction form
    1,979.40/2,729.34 = 1,685.64/x
  3. Step 3: Cross multiply
    1,979.40x = 2,729.34 × 1,685.64
  4. Step 4: Simplify right side
    1,979.40x = 4,600,684.68
  5. Step 5: Solve for x
    x = 4,600,684.68/1,979.40
  6. Step 6: Final answer
    x = 2,324.28

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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.