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Finding the Fourth Proportional to 2,121.86, 3,184.02 and 889.17

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Solution

The fourth proportional to 2,121.86, 3,184.02 and 889.17 is: 1,334.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.86 : 3,184.02 = 889.17 : x
  2. Step 2: Convert to fraction form
    2,121.86/3,184.02 = 889.17/x
  3. Step 3: Cross multiply
    2,121.86x = 3,184.02 × 889.17
  4. Step 4: Simplify right side
    2,121.86x = 2,831,135.06
  5. Step 5: Solve for x
    x = 2,831,135.06/2,121.86
  6. Step 6: Final answer
    x = 1,334.27

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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.