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Finding the Fourth Proportional to 1,995.60, 2,999.88 and 1,985.88

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Solution

The fourth proportional to 1,995.60, 2,999.88 and 1,985.88 is: 2,985.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,995.60 : 2,999.88 = 1,985.88 : x
  2. Step 2: Convert to fraction form
    1,995.60/2,999.88 = 1,985.88/x
  3. Step 3: Cross multiply
    1,995.60x = 2,999.88 × 1,985.88
  4. Step 4: Simplify right side
    1,995.60x = 5,957,401.69
  5. Step 5: Solve for x
    x = 5,957,401.69/1,995.60
  6. Step 6: Final answer
    x = 2,985.27

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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.