Home / 1,485.10-2,227.65-1,387.90

Finding the Fourth Proportional to 1,485.10, 2,227.65 and 1,387.90

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Solution

The fourth proportional to 1,485.10, 2,227.65 and 1,387.90 is: 2,081.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.10 : 2,227.65 = 1,387.90 : x
  2. Step 2: Convert to fraction form
    1,485.10/2,227.65 = 1,387.90/x
  3. Step 3: Cross multiply
    1,485.10x = 2,227.65 × 1,387.90
  4. Step 4: Simplify right side
    1,485.10x = 3,091,755.44
  5. Step 5: Solve for x
    x = 3,091,755.44/1,485.10
  6. Step 6: Final answer
    x = 2,081.85

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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.