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Finding the Fourth Proportional to 1,983.85, 2,972.65 and 1,611.84

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Solution

The fourth proportional to 1,983.85, 2,972.65 and 1,611.84 is: 2,415.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,983.85 : 2,972.65 = 1,611.84 : x
  2. Step 2: Convert to fraction form
    1,983.85/2,972.65 = 1,611.84/x
  3. Step 3: Cross multiply
    1,983.85x = 2,972.65 × 1,611.84
  4. Step 4: Simplify right side
    1,983.85x = 4,791,428.12
  5. Step 5: Solve for x
    x = 4,791,428.12/1,983.85
  6. Step 6: Final answer
    x = 2,415.22

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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.