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Finding the Fourth Proportional to 261,663.80, 393,078.90 and 251,036.60

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Solution

The fourth proportional to 261,663.80, 393,078.90 and 251,036.60 is: 377,114.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,663.80 : 393,078.90 = 251,036.60 : x
  2. Step 2: Convert to fraction form
    261,663.80/393,078.90 = 251,036.60/x
  3. Step 3: Cross multiply
    261,663.80x = 393,078.90 × 251,036.60
  4. Step 4: Simplify right side
    261,663.80x = 98,677,190,587.74
  5. Step 5: Solve for x
    x = 98,677,190,587.74/261,663.80
  6. Step 6: Final answer
    x = 377,114.41

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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.