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Finding the Fourth Proportional to 611,995,472.80, 917,993,209.20 and 441,084,047.20

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Solution

The fourth proportional to 611,995,472.80, 917,993,209.20 and 441,084,047.20 is: 661,626,070.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,995,472.80 : 917,993,209.20 = 441,084,047.20 : x
  2. Step 2: Convert to fraction form
    611,995,472.80/917,993,209.20 = 441,084,047.20/x
  3. Step 3: Cross multiply
    611,995,472.80x = 917,993,209.20 × 441,084,047.20
  4. Step 4: Simplify right side
    611,995,472.80x = 404,912,160,016,052,288
  5. Step 5: Solve for x
    x = 404,912,160,016,052,288/611,995,472.80
  6. Step 6: Final answer
    x = 661,626,070.80

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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.