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Finding the Fourth Proportional to 702,113,314.13, 968,919,610.26 and 388,840,960.61

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Solution

The fourth proportional to 702,113,314.13, 968,919,610.26 and 388,840,960.61 is: 536,602,318.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,113,314.13 : 968,919,610.26 = 388,840,960.61 : x
  2. Step 2: Convert to fraction form
    702,113,314.13/968,919,610.26 = 388,840,960.61/x
  3. Step 3: Cross multiply
    702,113,314.13x = 968,919,610.26 × 388,840,960.61
  4. Step 4: Simplify right side
    702,113,314.13x = 376,755,632,002,520,640
  5. Step 5: Solve for x
    x = 376,755,632,002,520,640/702,113,314.13
  6. Step 6: Final answer
    x = 536,602,318.21

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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.