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Finding the Fourth Proportional to 1,608.59, 2,219.11 and 1,111.92

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Solution

The fourth proportional to 1,608.59, 2,219.11 and 1,111.92 is: 1,533.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,608.59 : 2,219.11 = 1,111.92 : x
  2. Step 2: Convert to fraction form
    1,608.59/2,219.11 = 1,111.92/x
  3. Step 3: Cross multiply
    1,608.59x = 2,219.11 × 1,111.92
  4. Step 4: Simplify right side
    1,608.59x = 2,467,472.79
  5. Step 5: Solve for x
    x = 2,467,472.79/1,608.59
  6. Step 6: Final answer
    x = 1,533.94

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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.