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Finding the Fourth Proportional to 219,000.70, 328,501.05 and 191,881.90

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Solution

The fourth proportional to 219,000.70, 328,501.05 and 191,881.90 is: 287,822.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,000.70 : 328,501.05 = 191,881.90 : x
  2. Step 2: Convert to fraction form
    219,000.70/328,501.05 = 191,881.90/x
  3. Step 3: Cross multiply
    219,000.70x = 328,501.05 × 191,881.90
  4. Step 4: Simplify right side
    219,000.70x = 63,033,405,626.00
  5. Step 5: Solve for x
    x = 63,033,405,626.00/219,000.70
  6. Step 6: Final answer
    x = 287,822.85

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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.