Home / 2,179.40-3,008.26-1,393.45

Finding the Fourth Proportional to 2,179.40, 3,008.26 and 1,393.45

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Solution

The fourth proportional to 2,179.40, 3,008.26 and 1,393.45 is: 1,923.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,179.40 : 3,008.26 = 1,393.45 : x
  2. Step 2: Convert to fraction form
    2,179.40/3,008.26 = 1,393.45/x
  3. Step 3: Cross multiply
    2,179.40x = 3,008.26 × 1,393.45
  4. Step 4: Simplify right side
    2,179.40x = 4,191,859.90
  5. Step 5: Solve for x
    x = 4,191,859.90/2,179.40
  6. Step 6: Final answer
    x = 1,923.40

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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.