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Finding the Fourth Proportional to 1,625.12, 2,438 and 845.50

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Solution

The fourth proportional to 1,625.12, 2,438 and 845.50 is: 1,268.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,625.12 : 2,438 = 845.50 : x
  2. Step 2: Convert to fraction form
    1,625.12/2,438 = 845.50/x
  3. Step 3: Cross multiply
    1,625.12x = 2,438 × 845.50
  4. Step 4: Simplify right side
    1,625.12x = 2,061,329
  5. Step 5: Solve for x
    x = 2,061,329/1,625.12
  6. Step 6: Final answer
    x = 1,268.42

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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.