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Finding the Fourth Proportional to 612,735.62, 919,110.10 and 186,340.78

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Solution

The fourth proportional to 612,735.62, 919,110.10 and 186,340.78 is: 279,513.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,735.62 : 919,110.10 = 186,340.78 : x
  2. Step 2: Convert to fraction form
    612,735.62/919,110.10 = 186,340.78/x
  3. Step 3: Cross multiply
    612,735.62x = 919,110.10 × 186,340.78
  4. Step 4: Simplify right side
    612,735.62x = 171,267,692,939.88
  5. Step 5: Solve for x
    x = 171,267,692,939.88/612,735.62
  6. Step 6: Final answer
    x = 279,513.20

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1.5x scale

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.