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Finding the Fourth Proportional to 543,671,999.20, 815,507,998.80 and 543,671,999.20

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Solution

The fourth proportional to 543,671,999.20, 815,507,998.80 and 543,671,999.20 is: 815,507,998.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,671,999.20 : 815,507,998.80 = 543,671,999.20 : x
  2. Step 2: Convert to fraction form
    543,671,999.20/815,507,998.80 = 543,671,999.20/x
  3. Step 3: Cross multiply
    543,671,999.20x = 815,507,998.80 × 543,671,999.20
  4. Step 4: Simplify right side
    543,671,999.20x = 443,368,864,071,187,200
  5. Step 5: Solve for x
    x = 443,368,864,071,187,200/543,671,999.20
  6. Step 6: Final answer
    x = 815,507,998.80

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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.