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Finding the Fourth Proportional to 3,611.79, 5,418.14 and 1,663.74

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Solution

The fourth proportional to 3,611.79, 5,418.14 and 1,663.74 is: 2,495.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,611.79 : 5,418.14 = 1,663.74 : x
  2. Step 2: Convert to fraction form
    3,611.79/5,418.14 = 1,663.74/x
  3. Step 3: Cross multiply
    3,611.79x = 5,418.14 × 1,663.74
  4. Step 4: Simplify right side
    3,611.79x = 9,014,367.92
  5. Step 5: Solve for x
    x = 9,014,367.92/3,611.79
  6. Step 6: Final answer
    x = 2,495.82

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1.5x scale

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.