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Finding the Fourth Proportional to 612,766.72, 919,174.80 and 213,447.88

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Solution

The fourth proportional to 612,766.72, 919,174.80 and 213,447.88 is: 320,180.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,766.72 : 919,174.80 = 213,447.88 : x
  2. Step 2: Convert to fraction form
    612,766.72/919,174.80 = 213,447.88/x
  3. Step 3: Cross multiply
    612,766.72x = 919,174.80 × 213,447.88
  4. Step 4: Simplify right side
    612,766.72x = 196,195,912,409.42
  5. Step 5: Solve for x
    x = 196,195,912,409.42/612,766.72
  6. Step 6: Final answer
    x = 320,180.43

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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.