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Finding the Fourth Proportional to 1,999.75, 3,000.84 and 1,878.25

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Solution

The fourth proportional to 1,999.75, 3,000.84 and 1,878.25 is: 2,818.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999.75 : 3,000.84 = 1,878.25 : x
  2. Step 2: Convert to fraction form
    1,999.75/3,000.84 = 1,878.25/x
  3. Step 3: Cross multiply
    1,999.75x = 3,000.84 × 1,878.25
  4. Step 4: Simplify right side
    1,999.75x = 5,636,327.73
  5. Step 5: Solve for x
    x = 5,636,327.73/1,999.75
  6. Step 6: Final answer
    x = 2,818.52

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1.5x scale

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.