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Finding the Fourth Proportional to 448,803.78, 619,287.78 and 257,817.12

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Solution

The fourth proportional to 448,803.78, 619,287.78 and 257,817.12 is: 355,752.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,803.78 : 619,287.78 = 257,817.12 : x
  2. Step 2: Convert to fraction form
    448,803.78/619,287.78 = 257,817.12/x
  3. Step 3: Cross multiply
    448,803.78x = 619,287.78 × 257,817.12
  4. Step 4: Simplify right side
    448,803.78x = 159,662,991,890.79
  5. Step 5: Solve for x
    x = 159,662,991,890.79/448,803.78
  6. Step 6: Final answer
    x = 355,752.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.