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Finding the Fourth Proportional to 719,859.15, 993,399.80 and 397,591.34

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Solution

The fourth proportional to 719,859.15, 993,399.80 and 397,591.34 is: 548,672.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,859.15 : 993,399.80 = 397,591.34 : x
  2. Step 2: Convert to fraction form
    719,859.15/993,399.80 = 397,591.34/x
  3. Step 3: Cross multiply
    719,859.15x = 993,399.80 × 397,591.34
  4. Step 4: Simplify right side
    719,859.15x = 394,967,150,682.78
  5. Step 5: Solve for x
    x = 394,967,150,682.78/719,859.15
  6. Step 6: Final answer
    x = 548,672.82

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1.5x scale

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.