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Finding the Fourth Proportional to 404,207,999.80, 606,311,999.70 and 220,541,990.20

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Solution

The fourth proportional to 404,207,999.80, 606,311,999.70 and 220,541,990.20 is: 330,812,985.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,207,999.80 : 606,311,999.70 = 220,541,990.20 : x
  2. Step 2: Convert to fraction form
    404,207,999.80/606,311,999.70 = 220,541,990.20/x
  3. Step 3: Cross multiply
    404,207,999.80x = 606,311,999.70 × 220,541,990.20
  4. Step 4: Simplify right side
    404,207,999.80x = 133,717,255,095,979,808
  5. Step 5: Solve for x
    x = 133,717,255,095,979,808/404,207,999.80
  6. Step 6: Final answer
    x = 330,812,985.30

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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.