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Finding the Fourth Proportional to 719,659.05, 993,123.09 and 397,362.21

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Solution

The fourth proportional to 719,659.05, 993,123.09 and 397,362.21 is: 548,356.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,659.05 : 993,123.09 = 397,362.21 : x
  2. Step 2: Convert to fraction form
    719,659.05/993,123.09 = 397,362.21/x
  3. Step 3: Cross multiply
    719,659.05x = 993,123.09 × 397,362.21
  4. Step 4: Simplify right side
    719,659.05x = 394,629,585,844.43
  5. Step 5: Solve for x
    x = 394,629,585,844.43/719,659.05
  6. Step 6: Final answer
    x = 548,356.32

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Double scale
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Similar ratio
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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.