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Finding the Fourth Proportional to 655,806,842.18, 905,011,245.03 and 358,448,912.11

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Solution

The fourth proportional to 655,806,842.18, 905,011,245.03 and 358,448,912.11 is: 494,658,297.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,806,842.18 : 905,011,245.03 = 358,448,912.11 : x
  2. Step 2: Convert to fraction form
    655,806,842.18/905,011,245.03 = 358,448,912.11/x
  3. Step 3: Cross multiply
    655,806,842.18x = 905,011,245.03 × 358,448,912.11
  4. Step 4: Simplify right side
    655,806,842.18x = 324,400,296,228,320,128
  5. Step 5: Solve for x
    x = 324,400,296,228,320,128/655,806,842.18
  6. Step 6: Final answer
    x = 494,658,297.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.