Home / 2,088.80-2,883.04-1,380.78

Finding the Fourth Proportional to 2,088.80, 2,883.04 and 1,380.78

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Solution

The fourth proportional to 2,088.80, 2,883.04 and 1,380.78 is: 1,905.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,088.80 : 2,883.04 = 1,380.78 : x
  2. Step 2: Convert to fraction form
    2,088.80/2,883.04 = 1,380.78/x
  3. Step 3: Cross multiply
    2,088.80x = 2,883.04 × 1,380.78
  4. Step 4: Simplify right side
    2,088.80x = 3,980,843.97
  5. Step 5: Solve for x
    x = 3,980,843.97/2,088.80
  6. Step 6: Final answer
    x = 1,905.80

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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.