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Finding the Fourth Proportional to 1,625.10, 2,438.54 and 1,069.80

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Solution

The fourth proportional to 1,625.10, 2,438.54 and 1,069.80 is: 1,605.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,625.10 : 2,438.54 = 1,069.80 : x
  2. Step 2: Convert to fraction form
    1,625.10/2,438.54 = 1,069.80/x
  3. Step 3: Cross multiply
    1,625.10x = 2,438.54 × 1,069.80
  4. Step 4: Simplify right side
    1,625.10x = 2,608,750.09
  5. Step 5: Solve for x
    x = 2,608,750.09/1,625.10
  6. Step 6: Final answer
    x = 1,605.29

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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.