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Finding the Fourth Proportional to 3,985,708.80, 5,978,563.20 and 1,964,337.60

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Solution

The fourth proportional to 3,985,708.80, 5,978,563.20 and 1,964,337.60 is: 2,946,506.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985,708.80 : 5,978,563.20 = 1,964,337.60 : x
  2. Step 2: Convert to fraction form
    3,985,708.80/5,978,563.20 = 1,964,337.60/x
  3. Step 3: Cross multiply
    3,985,708.80x = 5,978,563.20 × 1,964,337.60
  4. Step 4: Simplify right side
    3,985,708.80x = 11,743,916,487,736.32
  5. Step 5: Solve for x
    x = 11,743,916,487,736.32/3,985,708.80
  6. Step 6: Final answer
    x = 2,946,506.40

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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.