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Finding the Fourth Proportional to 3,985,691,840.20, 5,978,537,760.30 and 3,985,691,840.20

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Solution

The fourth proportional to 3,985,691,840.20, 5,978,537,760.30 and 3,985,691,840.20 is: 5,978,537,760.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985,691,840.20 : 5,978,537,760.30 = 3,985,691,840.20 : x
  2. Step 2: Convert to fraction form
    3,985,691,840.20/5,978,537,760.30 = 3,985,691,840.20/x
  3. Step 3: Cross multiply
    3,985,691,840.20x = 5,978,537,760.30 × 3,985,691,840.20
  4. Step 4: Simplify right side
    3,985,691,840.20x = 23,828,609,167,555,293,184
  5. Step 5: Solve for x
    x = 23,828,609,167,555,293,184/3,985,691,840.20
  6. Step 6: Final answer
    x = 5,978,537,760.30

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1.5x scale

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.