Home / 2,859.50-3,945-1,796.80

Finding the Fourth Proportional to 2,859.50, 3,945 and 1,796.80

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Solution

The fourth proportional to 2,859.50, 3,945 and 1,796.80 is: 2,478.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,859.50 : 3,945 = 1,796.80 : x
  2. Step 2: Convert to fraction form
    2,859.50/3,945 = 1,796.80/x
  3. Step 3: Cross multiply
    2,859.50x = 3,945 × 1,796.80
  4. Step 4: Simplify right side
    2,859.50x = 7,088,376
  5. Step 5: Solve for x
    x = 7,088,376/2,859.50
  6. Step 6: Final answer
    x = 2,478.89

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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.