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Finding the Fourth Proportional to 1,890.84, 2,611.81 and 1,539.10

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Solution

The fourth proportional to 1,890.84, 2,611.81 and 1,539.10 is: 2,125.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.84 : 2,611.81 = 1,539.10 : x
  2. Step 2: Convert to fraction form
    1,890.84/2,611.81 = 1,539.10/x
  3. Step 3: Cross multiply
    1,890.84x = 2,611.81 × 1,539.10
  4. Step 4: Simplify right side
    1,890.84x = 4,019,836.77
  5. Step 5: Solve for x
    x = 4,019,836.77/1,890.84
  6. Step 6: Final answer
    x = 2,125.95

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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.