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Finding the Fourth Proportional to 413,819.20, 620,728.80 and 245,857.60

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Solution

The fourth proportional to 413,819.20, 620,728.80 and 245,857.60 is: 368,786.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,819.20 : 620,728.80 = 245,857.60 : x
  2. Step 2: Convert to fraction form
    413,819.20/620,728.80 = 245,857.60/x
  3. Step 3: Cross multiply
    413,819.20x = 620,728.80 × 245,857.60
  4. Step 4: Simplify right side
    413,819.20x = 152,610,893,018.88
  5. Step 5: Solve for x
    x = 152,610,893,018.88/413,819.20
  6. Step 6: Final answer
    x = 368,786.40

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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.