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Finding the Fourth Proportional to 818,999.92, 1,228,500.06 and 320,014

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Solution

The fourth proportional to 818,999.92, 1,228,500.06 and 320,014 is: 480,021.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,999.92 : 1,228,500.06 = 320,014 : x
  2. Step 2: Convert to fraction form
    818,999.92/1,228,500.06 = 320,014/x
  3. Step 3: Cross multiply
    818,999.92x = 1,228,500.06 × 320,014
  4. Step 4: Simplify right side
    818,999.92x = 393,137,218,200.84
  5. Step 5: Solve for x
    x = 393,137,218,200.84/818,999.92
  6. Step 6: Final answer
    x = 480,021.07

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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.