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Finding the Fourth Proportional to 719,978.58, 993,544.56 and 397,672.02

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Solution

The fourth proportional to 719,978.58, 993,544.56 and 397,672.02 is: 548,773.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,978.58 : 993,544.56 = 397,672.02 : x
  2. Step 2: Convert to fraction form
    719,978.58/993,544.56 = 397,672.02/x
  3. Step 3: Cross multiply
    719,978.58x = 993,544.56 × 397,672.02
  4. Step 4: Simplify right side
    719,978.58x = 395,104,872,135.21
  5. Step 5: Solve for x
    x = 395,104,872,135.21/719,978.58
  6. Step 6: Final answer
    x = 548,773.09

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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.