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Finding the Fourth Proportional to 612,768.61, 919,177.62 and 213,449.77

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Solution

The fourth proportional to 612,768.61, 919,177.62 and 213,449.77 is: 320,183.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,768.61 : 919,177.62 = 213,449.77 : x
  2. Step 2: Convert to fraction form
    612,768.61/919,177.62 = 213,449.77/x
  3. Step 3: Cross multiply
    612,768.61x = 919,177.62 × 213,449.77
  4. Step 4: Simplify right side
    612,768.61x = 196,198,251,578.15
  5. Step 5: Solve for x
    x = 196,198,251,578.15/612,768.61
  6. Step 6: Final answer
    x = 320,183.26

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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.