Home / 2,162.30-3,243.45-1,643.90

Finding the Fourth Proportional to 2,162.30, 3,243.45 and 1,643.90

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Solution

The fourth proportional to 2,162.30, 3,243.45 and 1,643.90 is: 2,465.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,162.30 : 3,243.45 = 1,643.90 : x
  2. Step 2: Convert to fraction form
    2,162.30/3,243.45 = 1,643.90/x
  3. Step 3: Cross multiply
    2,162.30x = 3,243.45 × 1,643.90
  4. Step 4: Simplify right side
    2,162.30x = 5,331,907.46
  5. Step 5: Solve for x
    x = 5,331,907.46/2,162.30
  6. Step 6: Final answer
    x = 2,465.85

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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.