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Finding the Fourth Proportional to 219,391.72, 328,949.34 and 186,123.40

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Solution

The fourth proportional to 219,391.72, 328,949.34 and 186,123.40 is: 279,067.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,391.72 : 328,949.34 = 186,123.40 : x
  2. Step 2: Convert to fraction form
    219,391.72/328,949.34 = 186,123.40/x
  3. Step 3: Cross multiply
    219,391.72x = 328,949.34 × 186,123.40
  4. Step 4: Simplify right side
    219,391.72x = 61,225,169,588.56
  5. Step 5: Solve for x
    x = 61,225,169,588.56/219,391.72
  6. Step 6: Final answer
    x = 279,067.82

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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.