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Finding the Fourth Proportional to 328,518.16, 492,772.92 and 79,198.16

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Solution

The fourth proportional to 328,518.16, 492,772.92 and 79,198.16 is: 118,796.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,518.16 : 492,772.92 = 79,198.16 : x
  2. Step 2: Convert to fraction form
    328,518.16/492,772.92 = 79,198.16/x
  3. Step 3: Cross multiply
    328,518.16x = 492,772.92 × 79,198.16
  4. Step 4: Simplify right side
    328,518.16x = 39,026,708,561.83
  5. Step 5: Solve for x
    x = 39,026,708,561.83/328,518.16
  6. Step 6: Final answer
    x = 118,796.20

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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.