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Finding the Fourth Proportional to 1,999.90, 2,996.20 and 1,740.70

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Solution

The fourth proportional to 1,999.90, 2,996.20 and 1,740.70 is: 2,607.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999.90 : 2,996.20 = 1,740.70 : x
  2. Step 2: Convert to fraction form
    1,999.90/2,996.20 = 1,740.70/x
  3. Step 3: Cross multiply
    1,999.90x = 2,996.20 × 1,740.70
  4. Step 4: Simplify right side
    1,999.90x = 5,215,485.34
  5. Step 5: Solve for x
    x = 5,215,485.34/1,999.90
  6. Step 6: Final answer
    x = 2,607.87

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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.