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Finding the Fourth Proportional to 1,611.70, 2,419.60 and 1,369.76

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Solution

The fourth proportional to 1,611.70, 2,419.60 and 1,369.76 is: 2,056.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.70 : 2,419.60 = 1,369.76 : x
  2. Step 2: Convert to fraction form
    1,611.70/2,419.60 = 1,369.76/x
  3. Step 3: Cross multiply
    1,611.70x = 2,419.60 × 1,369.76
  4. Step 4: Simplify right side
    1,611.70x = 3,314,268.10
  5. Step 5: Solve for x
    x = 3,314,268.10/1,611.70
  6. Step 6: Final answer
    x = 2,056.38

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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.