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Finding the Fourth Proportional to 2,738.71, 4,108.66 and 889.79

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Solution

The fourth proportional to 2,738.71, 4,108.66 and 889.79 is: 1,334.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,738.71 : 4,108.66 = 889.79 : x
  2. Step 2: Convert to fraction form
    2,738.71/4,108.66 = 889.79/x
  3. Step 3: Cross multiply
    2,738.71x = 4,108.66 × 889.79
  4. Step 4: Simplify right side
    2,738.71x = 3,655,821.81
  5. Step 5: Solve for x
    x = 3,655,821.81/2,738.71
  6. Step 6: Final answer
    x = 1,334.87

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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.