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Finding the Fourth Proportional to 300,990.95, 451,561.60 and 212,417.45

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Solution

The fourth proportional to 300,990.95, 451,561.60 and 212,417.45 is: 318,679.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,990.95 : 451,561.60 = 212,417.45 : x
  2. Step 2: Convert to fraction form
    300,990.95/451,561.60 = 212,417.45/x
  3. Step 3: Cross multiply
    300,990.95x = 451,561.60 × 212,417.45
  4. Step 4: Simplify right side
    300,990.95x = 95,919,563,789.50
  5. Step 5: Solve for x
    x = 95,919,563,789.50/300,990.95
  6. Step 6: Final answer
    x = 318,679.23

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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.