Home / 2,145.63-3,218.45-1,380.99

Finding the Fourth Proportional to 2,145.63, 3,218.45 and 1,380.99

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Solution

The fourth proportional to 2,145.63, 3,218.45 and 1,380.99 is: 2,071.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145.63 : 3,218.45 = 1,380.99 : x
  2. Step 2: Convert to fraction form
    2,145.63/3,218.45 = 1,380.99/x
  3. Step 3: Cross multiply
    2,145.63x = 3,218.45 × 1,380.99
  4. Step 4: Simplify right side
    2,145.63x = 4,444,640.36
  5. Step 5: Solve for x
    x = 4,444,640.36/2,145.63
  6. Step 6: Final answer
    x = 2,071.49

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Double scale
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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.