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Finding the Fourth Proportional to 3,982,520.64, 5,973,768.48 and 990,704.64

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Solution

The fourth proportional to 3,982,520.64, 5,973,768.48 and 990,704.64 is: 1,486,053.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,982,520.64 : 5,973,768.48 = 990,704.64 : x
  2. Step 2: Convert to fraction form
    3,982,520.64/5,973,768.48 = 990,704.64/x
  3. Step 3: Cross multiply
    3,982,520.64x = 5,973,768.48 × 990,704.64
  4. Step 4: Simplify right side
    3,982,520.64x = 5,918,240,151,421.75
  5. Step 5: Solve for x
    x = 5,918,240,151,421.75/3,982,520.64
  6. Step 6: Final answer
    x = 1,486,053.86

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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.