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Finding the Fourth Proportional to 1,398,605,699.43, 1,930,066,046.68 and 763,526,191.19

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Solution

The fourth proportional to 1,398,605,699.43, 1,930,066,046.68 and 763,526,191.19 is: 1,053,660,783.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,605,699.43 : 1,930,066,046.68 = 763,526,191.19 : x
  2. Step 2: Convert to fraction form
    1,398,605,699.43/1,930,066,046.68 = 763,526,191.19/x
  3. Step 3: Cross multiply
    1,398,605,699.43x = 1,930,066,046.68 × 763,526,191.19
  4. Step 4: Simplify right side
    1,398,605,699.43x = 1,473,655,977,364,860,160
  5. Step 5: Solve for x
    x = 1,473,655,977,364,860,160/1,398,605,699.43
  6. Step 6: Final answer
    x = 1,053,660,783.71

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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.