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Finding the Fourth Proportional to 1,608.99, 2,221.35 and 1,255.74

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Solution

The fourth proportional to 1,608.99, 2,221.35 and 1,255.74 is: 1,733.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,608.99 : 2,221.35 = 1,255.74 : x
  2. Step 2: Convert to fraction form
    1,608.99/2,221.35 = 1,255.74/x
  3. Step 3: Cross multiply
    1,608.99x = 2,221.35 × 1,255.74
  4. Step 4: Simplify right side
    1,608.99x = 2,789,438.05
  5. Step 5: Solve for x
    x = 2,789,438.05/1,608.99
  6. Step 6: Final answer
    x = 1,733.66

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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.