Home / 1,988.90-2,989.33-1,644.44

Finding the Fourth Proportional to 1,988.90, 2,989.33 and 1,644.44

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Solution

The fourth proportional to 1,988.90, 2,989.33 and 1,644.44 is: 2,471.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.90 : 2,989.33 = 1,644.44 : x
  2. Step 2: Convert to fraction form
    1,988.90/2,989.33 = 1,644.44/x
  3. Step 3: Cross multiply
    1,988.90x = 2,989.33 × 1,644.44
  4. Step 4: Simplify right side
    1,988.90x = 4,915,754.77
  5. Step 5: Solve for x
    x = 4,915,754.77/1,988.90
  6. Step 6: Final answer
    x = 2,471.60

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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.