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Finding the Fourth Proportional to 2,412.25, 3,617.26 and 768.42

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Solution

The fourth proportional to 2,412.25, 3,617.26 and 768.42 is: 1,152.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,412.25 : 3,617.26 = 768.42 : x
  2. Step 2: Convert to fraction form
    2,412.25/3,617.26 = 768.42/x
  3. Step 3: Cross multiply
    2,412.25x = 3,617.26 × 768.42
  4. Step 4: Simplify right side
    2,412.25x = 2,779,573.01
  5. Step 5: Solve for x
    x = 2,779,573.01/2,412.25
  6. Step 6: Final answer
    x = 1,152.28

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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.