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Finding the Fourth Proportional to 2,999.60, 4,504.80 and 2,178.80

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Solution

The fourth proportional to 2,999.60, 4,504.80 and 2,178.80 is: 3,272.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,999.60 : 4,504.80 = 2,178.80 : x
  2. Step 2: Convert to fraction form
    2,999.60/4,504.80 = 2,178.80/x
  3. Step 3: Cross multiply
    2,999.60x = 4,504.80 × 2,178.80
  4. Step 4: Simplify right side
    2,999.60x = 9,815,058.24
  5. Step 5: Solve for x
    x = 9,815,058.24/2,999.60
  6. Step 6: Final answer
    x = 3,272.12

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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.