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Finding the Fourth Proportional to 639,717,571.44, 959,576,364.48 and 155,043,379.44

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Solution

The fourth proportional to 639,717,571.44, 959,576,364.48 and 155,043,379.44 is: 232,565,070.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,717,571.44 : 959,576,364.48 = 155,043,379.44 : x
  2. Step 2: Convert to fraction form
    639,717,571.44/959,576,364.48 = 155,043,379.44/x
  3. Step 3: Cross multiply
    639,717,571.44x = 959,576,364.48 × 155,043,379.44
  4. Step 4: Simplify right side
    639,717,571.44x = 148,775,962,379,728,384
  5. Step 5: Solve for x
    x = 148,775,962,379,728,384/639,717,571.44
  6. Step 6: Final answer
    x = 232,565,070.93

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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.