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Finding the Fourth Proportional to 372,991,999.80, 559,487,999.70 and 370,603,212.60

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Solution

The fourth proportional to 372,991,999.80, 559,487,999.70 and 370,603,212.60 is: 555,904,818.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,991,999.80 : 559,487,999.70 = 370,603,212.60 : x
  2. Step 2: Convert to fraction form
    372,991,999.80/559,487,999.70 = 370,603,212.60/x
  3. Step 3: Cross multiply
    372,991,999.80x = 559,487,999.70 × 370,603,212.60
  4. Step 4: Simplify right side
    372,991,999.80x = 207,348,050,099,967,872
  5. Step 5: Solve for x
    x = 207,348,050,099,967,872/372,991,999.80
  6. Step 6: Final answer
    x = 555,904,818.90

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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.