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Finding the Fourth Proportional to 719,836,986.86, 993,375,999.87 and 389,812,695.02

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Solution

The fourth proportional to 719,836,986.86, 993,375,999.87 and 389,812,695.02 is: 537,942,037.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,836,986.86 : 993,375,999.87 = 389,812,695.02 : x
  2. Step 2: Convert to fraction form
    719,836,986.86/993,375,999.87 = 389,812,695.02/x
  3. Step 3: Cross multiply
    719,836,986.86x = 993,375,999.87 × 389,812,695.02
  4. Step 4: Simplify right side
    719,836,986.86x = 387,230,575,677,511,872
  5. Step 5: Solve for x
    x = 387,230,575,677,511,872/719,836,986.86
  6. Step 6: Final answer
    x = 537,942,037.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.