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Finding the Fourth Proportional to 354,639.20, 531,958.80 and 168,015.20

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Solution

The fourth proportional to 354,639.20, 531,958.80 and 168,015.20 is: 252,022.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,639.20 : 531,958.80 = 168,015.20 : x
  2. Step 2: Convert to fraction form
    354,639.20/531,958.80 = 168,015.20/x
  3. Step 3: Cross multiply
    354,639.20x = 531,958.80 × 168,015.20
  4. Step 4: Simplify right side
    354,639.20x = 89,377,164,173.76
  5. Step 5: Solve for x
    x = 89,377,164,173.76/354,639.20
  6. Step 6: Final answer
    x = 252,022.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.