Home / 1,860.21-2,789.43-1,080.45

Finding the Fourth Proportional to 1,860.21, 2,789.43 and 1,080.45

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Solution

The fourth proportional to 1,860.21, 2,789.43 and 1,080.45 is: 1,620.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,860.21 : 2,789.43 = 1,080.45 : x
  2. Step 2: Convert to fraction form
    1,860.21/2,789.43 = 1,080.45/x
  3. Step 3: Cross multiply
    1,860.21x = 2,789.43 × 1,080.45
  4. Step 4: Simplify right side
    1,860.21x = 3,013,839.64
  5. Step 5: Solve for x
    x = 3,013,839.64/1,860.21
  6. Step 6: Final answer
    x = 1,620.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.