Home / 2,161.06-3,239.54-1,378.87

Finding the Fourth Proportional to 2,161.06, 3,239.54 and 1,378.87

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Solution

The fourth proportional to 2,161.06, 3,239.54 and 1,378.87 is: 2,066.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,161.06 : 3,239.54 = 1,378.87 : x
  2. Step 2: Convert to fraction form
    2,161.06/3,239.54 = 1,378.87/x
  3. Step 3: Cross multiply
    2,161.06x = 3,239.54 × 1,378.87
  4. Step 4: Simplify right side
    2,161.06x = 4,466,897.63
  5. Step 5: Solve for x
    x = 4,466,897.63/2,161.06
  6. Step 6: Final answer
    x = 2,066.99

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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.