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Finding the Fourth Proportional to 404,705.80, 607,131.60 and 168,072.40

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Solution

The fourth proportional to 404,705.80, 607,131.60 and 168,072.40 is: 252,138.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,705.80 : 607,131.60 = 168,072.40 : x
  2. Step 2: Convert to fraction form
    404,705.80/607,131.60 = 168,072.40/x
  3. Step 3: Cross multiply
    404,705.80x = 607,131.60 × 168,072.40
  4. Step 4: Simplify right side
    404,705.80x = 102,042,065,127.84
  5. Step 5: Solve for x
    x = 102,042,065,127.84/404,705.80
  6. Step 6: Final answer
    x = 252,138.88

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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.