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Finding the Fourth Proportional to 2,188.80, 3,281.98 and 1,929.41

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Solution

The fourth proportional to 2,188.80, 3,281.98 and 1,929.41 is: 2,893.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.80 : 3,281.98 = 1,929.41 : x
  2. Step 2: Convert to fraction form
    2,188.80/3,281.98 = 1,929.41/x
  3. Step 3: Cross multiply
    2,188.80x = 3,281.98 × 1,929.41
  4. Step 4: Simplify right side
    2,188.80x = 6,332,263.80
  5. Step 5: Solve for x
    x = 6,332,263.80/2,188.80
  6. Step 6: Final answer
    x = 2,893.03

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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.