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Finding the Fourth Proportional to 364,620.30, 546,930.45 and 127,986.90

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Solution

The fourth proportional to 364,620.30, 546,930.45 and 127,986.90 is: 191,980.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    364,620.30 : 546,930.45 = 127,986.90 : x
  2. Step 2: Convert to fraction form
    364,620.30/546,930.45 = 127,986.90/x
  3. Step 3: Cross multiply
    364,620.30x = 546,930.45 × 127,986.90
  4. Step 4: Simplify right side
    364,620.30x = 69,999,932,811.11
  5. Step 5: Solve for x
    x = 69,999,932,811.11/364,620.30
  6. Step 6: Final answer
    x = 191,980.35

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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.