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Finding the Fourth Proportional to 290,330.40, 434,919.60 and 255,693.60

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Solution

The fourth proportional to 290,330.40, 434,919.60 and 255,693.60 is: 383,033.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,330.40 : 434,919.60 = 255,693.60 : x
  2. Step 2: Convert to fraction form
    290,330.40/434,919.60 = 255,693.60/x
  3. Step 3: Cross multiply
    290,330.40x = 434,919.60 × 255,693.60
  4. Step 4: Simplify right side
    290,330.40x = 111,206,158,234.56
  5. Step 5: Solve for x
    x = 111,206,158,234.56/290,330.40
  6. Step 6: Final answer
    x = 383,033.12

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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.