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Finding the Fourth Proportional to 679,938,652.20, 1,019,907,978.30 and 219,923,322.60

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Solution

The fourth proportional to 679,938,652.20, 1,019,907,978.30 and 219,923,322.60 is: 329,884,983.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,938,652.20 : 1,019,907,978.30 = 219,923,322.60 : x
  2. Step 2: Convert to fraction form
    679,938,652.20/1,019,907,978.30 = 219,923,322.60/x
  3. Step 3: Cross multiply
    679,938,652.20x = 1,019,907,978.30 × 219,923,322.60
  4. Step 4: Simplify right side
    679,938,652.20x = 224,301,551,333,984,672
  5. Step 5: Solve for x
    x = 224,301,551,333,984,672/679,938,652.20
  6. Step 6: Final answer
    x = 329,884,983.90

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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.