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Finding the Fourth Proportional to 1,605.26, 2,408.22 and 912.25

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Solution

The fourth proportional to 1,605.26, 2,408.22 and 912.25 is: 1,368.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,605.26 : 2,408.22 = 912.25 : x
  2. Step 2: Convert to fraction form
    1,605.26/2,408.22 = 912.25/x
  3. Step 3: Cross multiply
    1,605.26x = 2,408.22 × 912.25
  4. Step 4: Simplify right side
    1,605.26x = 2,196,892.67
  5. Step 5: Solve for x
    x = 2,196,892.67/1,605.26
  6. Step 6: Final answer
    x = 1,368.56

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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.