Home / 428,848,133,999.20-643,272,200,998.80-391,697,715,464.80

Finding the Fourth Proportional to 428,848,133,999.20, 643,272,200,998.80 and 391,697,715,464.80

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Solution

The fourth proportional to 428,848,133,999.20, 643,272,200,998.80 and 391,697,715,464.80 is: 587,546,573,197.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,848,133,999.20 : 643,272,200,998.80 = 391,697,715,464.80 : x
  2. Step 2: Convert to fraction form
    428,848,133,999.20/643,272,200,998.80 = 391,697,715,464.80/x
  3. Step 3: Cross multiply
    428,848,133,999.20x = 643,272,200,998.80 × 391,697,715,464.80
  4. Step 4: Simplify right side
    428,848,133,999.20x = 251,968,251,553,243,602,092,032
  5. Step 5: Solve for x
    x = 251,968,251,553,243,602,092,032/428,848,133,999.20
  6. Step 6: Final answer
    x = 587,546,573,197.20

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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.