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Finding the Fourth Proportional to 338,998.20, 507,914.10 and 220,608.60

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Solution

The fourth proportional to 338,998.20, 507,914.10 and 220,608.60 is: 330,533.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,998.20 : 507,914.10 = 220,608.60 : x
  2. Step 2: Convert to fraction form
    338,998.20/507,914.10 = 220,608.60/x
  3. Step 3: Cross multiply
    338,998.20x = 507,914.10 × 220,608.60
  4. Step 4: Simplify right side
    338,998.20x = 112,050,218,521.26
  5. Step 5: Solve for x
    x = 112,050,218,521.26/338,998.20
  6. Step 6: Final answer
    x = 330,533.37

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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.