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Finding the Fourth Proportional to 7,431,978.42, 11,145,294.57 and 2,572,965.54

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Solution

The fourth proportional to 7,431,978.42, 11,145,294.57 and 2,572,965.54 is: 3,858,522.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,431,978.42 : 11,145,294.57 = 2,572,965.54 : x
  2. Step 2: Convert to fraction form
    7,431,978.42/11,145,294.57 = 2,572,965.54/x
  3. Step 3: Cross multiply
    7,431,978.42x = 11,145,294.57 × 2,572,965.54
  4. Step 4: Simplify right side
    7,431,978.42x = 28,676,458,861,759.12
  5. Step 5: Solve for x
    x = 28,676,458,861,759.12/7,431,978.42
  6. Step 6: Final answer
    x = 3,858,522.89

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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.