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Finding the Fourth Proportional to 383,993.20, 575,989.80 and 342,002.80

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Solution

The fourth proportional to 383,993.20, 575,989.80 and 342,002.80 is: 513,004.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,993.20 : 575,989.80 = 342,002.80 : x
  2. Step 2: Convert to fraction form
    383,993.20/575,989.80 = 342,002.80/x
  3. Step 3: Cross multiply
    383,993.20x = 575,989.80 × 342,002.80
  4. Step 4: Simplify right side
    383,993.20x = 196,990,124,371.44
  5. Step 5: Solve for x
    x = 196,990,124,371.44/383,993.20
  6. Step 6: Final answer
    x = 513,004.20

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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.