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Finding the Fourth Proportional to 1,608.88, 2,220.25 and 872.88

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Solution

The fourth proportional to 1,608.88, 2,220.25 and 872.88 is: 1,204.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,608.88 : 2,220.25 = 872.88 : x
  2. Step 2: Convert to fraction form
    1,608.88/2,220.25 = 872.88/x
  3. Step 3: Cross multiply
    1,608.88x = 2,220.25 × 872.88
  4. Step 4: Simplify right side
    1,608.88x = 1,937,998.54
  5. Step 5: Solve for x
    x = 1,937,998.54/1,608.88
  6. Step 6: Final answer
    x = 1,204.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.