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Finding the Fourth Proportional to 289,380.57, 399,361.78 and 162,055.05

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Solution

The fourth proportional to 289,380.57, 399,361.78 and 162,055.05 is: 223,645.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,380.57 : 399,361.78 = 162,055.05 : x
  2. Step 2: Convert to fraction form
    289,380.57/399,361.78 = 162,055.05/x
  3. Step 3: Cross multiply
    289,380.57x = 399,361.78 × 162,055.05
  4. Step 4: Simplify right side
    289,380.57x = 64,718,591,019.39
  5. Step 5: Solve for x
    x = 64,718,591,019.39/289,380.57
  6. Step 6: Final answer
    x = 223,645.26

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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.