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Finding the Fourth Proportional to 191,680.40, 287,866.20 and 185,459.60

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Solution

The fourth proportional to 191,680.40, 287,866.20 and 185,459.60 is: 278,523.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,680.40 : 287,866.20 = 185,459.60 : x
  2. Step 2: Convert to fraction form
    191,680.40/287,866.20 = 185,459.60/x
  3. Step 3: Cross multiply
    191,680.40x = 287,866.20 × 185,459.60
  4. Step 4: Simplify right side
    191,680.40x = 53,387,550,305.52
  5. Step 5: Solve for x
    x = 53,387,550,305.52/191,680.40
  6. Step 6: Final answer
    x = 278,523.78

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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.