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Finding the Fourth Proportional to 612,671.08, 919,007 and 191,979.76

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Solution

The fourth proportional to 612,671.08, 919,007 and 191,979.76 is: 287,969.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,671.08 : 919,007 = 191,979.76 : x
  2. Step 2: Convert to fraction form
    612,671.08/919,007 = 191,979.76/x
  3. Step 3: Cross multiply
    612,671.08x = 919,007 × 191,979.76
  4. Step 4: Simplify right side
    612,671.08x = 176,430,743,298.32
  5. Step 5: Solve for x
    x = 176,430,743,298.32/612,671.08
  6. Step 6: Final answer
    x = 287,969.76

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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.