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Finding the Fourth Proportional to 612,871.03, 919,310.46 and 213,519.25

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Solution

The fourth proportional to 612,871.03, 919,310.46 and 213,519.25 is: 320,280.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,871.03 : 919,310.46 = 213,519.25 : x
  2. Step 2: Convert to fraction form
    612,871.03/919,310.46 = 213,519.25/x
  3. Step 3: Cross multiply
    612,871.03x = 919,310.46 × 213,519.25
  4. Step 4: Simplify right side
    612,871.03x = 196,290,479,936.36
  5. Step 5: Solve for x
    x = 196,290,479,936.36/612,871.03
  6. Step 6: Final answer
    x = 320,280.24

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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.