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Finding the Fourth Proportional to 518,371.78, 777,557.67 and 219,190.18

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Solution

The fourth proportional to 518,371.78, 777,557.67 and 219,190.18 is: 328,785.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,371.78 : 777,557.67 = 219,190.18 : x
  2. Step 2: Convert to fraction form
    518,371.78/777,557.67 = 219,190.18/x
  3. Step 3: Cross multiply
    518,371.78x = 777,557.67 × 219,190.18
  4. Step 4: Simplify right side
    518,371.78x = 170,433,000,663.94
  5. Step 5: Solve for x
    x = 170,433,000,663.94/518,371.78
  6. Step 6: Final answer
    x = 328,785.26

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Similar ratio
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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.