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Finding the Fourth Proportional to 1,625.75, 2,243.53 and 879.70

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Solution

The fourth proportional to 1,625.75, 2,243.53 and 879.70 is: 1,213.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,625.75 : 2,243.53 = 879.70 : x
  2. Step 2: Convert to fraction form
    1,625.75/2,243.53 = 879.70/x
  3. Step 3: Cross multiply
    1,625.75x = 2,243.53 × 879.70
  4. Step 4: Simplify right side
    1,625.75x = 1,973,634.77
  5. Step 5: Solve for x
    x = 1,973,634.77/1,625.75
  6. Step 6: Final answer
    x = 1,213.99

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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.