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Finding the Fourth Proportional to 268,015.20, 401,439.60 and 162,650.40

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Solution

The fourth proportional to 268,015.20, 401,439.60 and 162,650.40 is: 243,621.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,015.20 : 401,439.60 = 162,650.40 : x
  2. Step 2: Convert to fraction form
    268,015.20/401,439.60 = 162,650.40/x
  3. Step 3: Cross multiply
    268,015.20x = 401,439.60 × 162,650.40
  4. Step 4: Simplify right side
    268,015.20x = 65,294,311,515.84
  5. Step 5: Solve for x
    x = 65,294,311,515.84/268,015.20
  6. Step 6: Final answer
    x = 243,621.67

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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.