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Finding the Fourth Proportional to 1,551.44, 2,140.84 and 879.27

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Solution

The fourth proportional to 1,551.44, 2,140.84 and 879.27 is: 1,213.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.44 : 2,140.84 = 879.27 : x
  2. Step 2: Convert to fraction form
    1,551.44/2,140.84 = 879.27/x
  3. Step 3: Cross multiply
    1,551.44x = 2,140.84 × 879.27
  4. Step 4: Simplify right side
    1,551.44x = 1,882,371.99
  5. Step 5: Solve for x
    x = 1,882,371.99/1,551.44
  6. Step 6: Final answer
    x = 1,213.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.