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Finding the Fourth Proportional to 520,861.75, 781,370.63 and 188,515.51

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Solution

The fourth proportional to 520,861.75, 781,370.63 and 188,515.51 is: 282,801.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,861.75 : 781,370.63 = 188,515.51 : x
  2. Step 2: Convert to fraction form
    520,861.75/781,370.63 = 188,515.51/x
  3. Step 3: Cross multiply
    520,861.75x = 781,370.63 × 188,515.51
  4. Step 4: Simplify right side
    520,861.75x = 147,300,482,813.47
  5. Step 5: Solve for x
    x = 147,300,482,813.47/520,861.75
  6. Step 6: Final answer
    x = 282,801.50

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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.