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Finding the Fourth Proportional to 818,998.92, 1,228,498.56 and 320,013

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Solution

The fourth proportional to 818,998.92, 1,228,498.56 and 320,013 is: 480,019.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,998.92 : 1,228,498.56 = 320,013 : x
  2. Step 2: Convert to fraction form
    818,998.92/1,228,498.56 = 320,013/x
  3. Step 3: Cross multiply
    818,998.92x = 1,228,498.56 × 320,013
  4. Step 4: Simplify right side
    818,998.92x = 393,135,509,681.28
  5. Step 5: Solve for x
    x = 393,135,509,681.28/818,998.92
  6. Step 6: Final answer
    x = 480,019.57

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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.