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Finding the Fourth Proportional to 290,626.80, 435,940.20 and 255,634.80

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Solution

The fourth proportional to 290,626.80, 435,940.20 and 255,634.80 is: 383,452.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,626.80 : 435,940.20 = 255,634.80 : x
  2. Step 2: Convert to fraction form
    290,626.80/435,940.20 = 255,634.80/x
  3. Step 3: Cross multiply
    290,626.80x = 435,940.20 × 255,634.80
  4. Step 4: Simplify right side
    290,626.80x = 111,441,485,838.96
  5. Step 5: Solve for x
    x = 111,441,485,838.96/290,626.80
  6. Step 6: Final answer
    x = 383,452.20

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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.