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Finding the Fourth Proportional to 329,819.20, 494,728.80 and 290,420.80

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Solution

The fourth proportional to 329,819.20, 494,728.80 and 290,420.80 is: 435,631.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,819.20 : 494,728.80 = 290,420.80 : x
  2. Step 2: Convert to fraction form
    329,819.20/494,728.80 = 290,420.80/x
  3. Step 3: Cross multiply
    329,819.20x = 494,728.80 × 290,420.80
  4. Step 4: Simplify right side
    329,819.20x = 143,679,533,879.04
  5. Step 5: Solve for x
    x = 143,679,533,879.04/329,819.20
  6. Step 6: Final answer
    x = 435,631.20

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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.