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Finding the Fourth Proportional to 1,608.40, 2,412.96 and 634.78

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Solution

The fourth proportional to 1,608.40, 2,412.96 and 634.78 is: 952.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,608.40 : 2,412.96 = 634.78 : x
  2. Step 2: Convert to fraction form
    1,608.40/2,412.96 = 634.78/x
  3. Step 3: Cross multiply
    1,608.40x = 2,412.96 × 634.78
  4. Step 4: Simplify right side
    1,608.40x = 1,531,698.75
  5. Step 5: Solve for x
    x = 1,531,698.75/1,608.40
  6. Step 6: Final answer
    x = 952.31

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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.