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Finding the Fourth Proportional to 1,189,137.60, 1,783,978.88 and 515,332

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Solution

The fourth proportional to 1,189,137.60, 1,783,978.88 and 515,332 is: 773,116.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,137.60 : 1,783,978.88 = 515,332 : x
  2. Step 2: Convert to fraction form
    1,189,137.60/1,783,978.88 = 515,332/x
  3. Step 3: Cross multiply
    1,189,137.60x = 1,783,978.88 × 515,332
  4. Step 4: Simplify right side
    1,189,137.60x = 919,341,404,188.16
  5. Step 5: Solve for x
    x = 919,341,404,188.16/1,189,137.60
  6. Step 6: Final answer
    x = 773,116.08

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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.