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Finding the Fourth Proportional to 305,912.80, 458,869.20 and 242,927.20

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Solution

The fourth proportional to 305,912.80, 458,869.20 and 242,927.20 is: 364,390.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,912.80 : 458,869.20 = 242,927.20 : x
  2. Step 2: Convert to fraction form
    305,912.80/458,869.20 = 242,927.20/x
  3. Step 3: Cross multiply
    305,912.80x = 458,869.20 × 242,927.20
  4. Step 4: Simplify right side
    305,912.80x = 111,471,809,922.24
  5. Step 5: Solve for x
    x = 111,471,809,922.24/305,912.80
  6. Step 6: Final answer
    x = 364,390.80

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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.