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Finding the Fourth Proportional to 665,981,606.40, 998,972,409.60 and 655,777,939.20

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Solution

The fourth proportional to 665,981,606.40, 998,972,409.60 and 655,777,939.20 is: 983,666,908.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,981,606.40 : 998,972,409.60 = 655,777,939.20 : x
  2. Step 2: Convert to fraction form
    665,981,606.40/998,972,409.60 = 655,777,939.20/x
  3. Step 3: Cross multiply
    665,981,606.40x = 998,972,409.60 × 655,777,939.20
  4. Step 4: Simplify right side
    665,981,606.40x = 655,104,068,085,146,368
  5. Step 5: Solve for x
    x = 655,104,068,085,146,368/665,981,606.40
  6. Step 6: Final answer
    x = 983,666,908.80

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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.