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Finding the Fourth Proportional to 3,611, 5,388.55 and 3,222.20

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Solution

The fourth proportional to 3,611, 5,388.55 and 3,222.20 is: 4,808.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,611 : 5,388.55 = 3,222.20 : x
  2. Step 2: Convert to fraction form
    3,611/5,388.55 = 3,222.20/x
  3. Step 3: Cross multiply
    3,611x = 5,388.55 × 3,222.20
  4. Step 4: Simplify right side
    3,611x = 17,362,985.81
  5. Step 5: Solve for x
    x = 17,362,985.81/3,611
  6. Step 6: Final answer
    x = 4,808.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.