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Finding the Fourth Proportional to 228,687.40, 343,031.10 and 191,945.80

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Solution

The fourth proportional to 228,687.40, 343,031.10 and 191,945.80 is: 287,918.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,687.40 : 343,031.10 = 191,945.80 : x
  2. Step 2: Convert to fraction form
    228,687.40/343,031.10 = 191,945.80/x
  3. Step 3: Cross multiply
    228,687.40x = 343,031.10 × 191,945.80
  4. Step 4: Simplify right side
    228,687.40x = 65,843,378,914.38
  5. Step 5: Solve for x
    x = 65,843,378,914.38/228,687.40
  6. Step 6: Final answer
    x = 287,918.70

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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.