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Finding the Fourth Proportional to 518,772.89, 778,239.80 and 219,254.73

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Solution

The fourth proportional to 518,772.89, 778,239.80 and 219,254.73 is: 328,916.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,772.89 : 778,239.80 = 219,254.73 : x
  2. Step 2: Convert to fraction form
    518,772.89/778,239.80 = 219,254.73/x
  3. Step 3: Cross multiply
    518,772.89x = 778,239.80 × 219,254.73
  4. Step 4: Simplify right side
    518,772.89x = 170,632,756,127.98
  5. Step 5: Solve for x
    x = 170,632,756,127.98/518,772.89
  6. Step 6: Final answer
    x = 328,916.10

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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.