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Finding the Fourth Proportional to 3,261.91, 4,499.92 and 1,917.08

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Solution

The fourth proportional to 3,261.91, 4,499.92 and 1,917.08 is: 2,644.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,261.91 : 4,499.92 = 1,917.08 : x
  2. Step 2: Convert to fraction form
    3,261.91/4,499.92 = 1,917.08/x
  3. Step 3: Cross multiply
    3,261.91x = 4,499.92 × 1,917.08
  4. Step 4: Simplify right side
    3,261.91x = 8,626,706.63
  5. Step 5: Solve for x
    x = 8,626,706.63/3,261.91
  6. Step 6: Final answer
    x = 2,644.68

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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.