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Finding the Fourth Proportional to 398,219.20, 597,328.80 and 367,806.40

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Solution

The fourth proportional to 398,219.20, 597,328.80 and 367,806.40 is: 551,709.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,219.20 : 597,328.80 = 367,806.40 : x
  2. Step 2: Convert to fraction form
    398,219.20/597,328.80 = 367,806.40/x
  3. Step 3: Cross multiply
    398,219.20x = 597,328.80 × 367,806.40
  4. Step 4: Simplify right side
    398,219.20x = 219,701,355,544.32
  5. Step 5: Solve for x
    x = 219,701,355,544.32/398,219.20
  6. Step 6: Final answer
    x = 551,709.60

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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.