Home / 2,018.80-2,789.79-1,520.57

Finding the Fourth Proportional to 2,018.80, 2,789.79 and 1,520.57

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Solution

The fourth proportional to 2,018.80, 2,789.79 and 1,520.57 is: 2,101.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,018.80 : 2,789.79 = 1,520.57 : x
  2. Step 2: Convert to fraction form
    2,018.80/2,789.79 = 1,520.57/x
  3. Step 3: Cross multiply
    2,018.80x = 2,789.79 × 1,520.57
  4. Step 4: Simplify right side
    2,018.80x = 4,242,080.81
  5. Step 5: Solve for x
    x = 4,242,080.81/2,018.80
  6. Step 6: Final answer
    x = 2,101.29

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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.