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Finding the Fourth Proportional to 612,764.99, 919,172.21 and 213,446.15

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Solution

The fourth proportional to 612,764.99, 919,172.21 and 213,446.15 is: 320,177.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,764.99 : 919,172.21 = 213,446.15 : x
  2. Step 2: Convert to fraction form
    612,764.99/919,172.21 = 213,446.15/x
  3. Step 3: Cross multiply
    612,764.99x = 919,172.21 × 213,446.15
  4. Step 4: Simplify right side
    612,764.99x = 196,193,763,748.40
  5. Step 5: Solve for x
    x = 196,193,763,748.40/612,764.99
  6. Step 6: Final answer
    x = 320,177.83

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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.