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Finding the Fourth Proportional to 448,552.65, 672,737.22 and 128,618.81

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Solution

The fourth proportional to 448,552.65, 672,737.22 and 128,618.81 is: 192,901.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,552.65 : 672,737.22 = 128,618.81 : x
  2. Step 2: Convert to fraction form
    448,552.65/672,737.22 = 128,618.81/x
  3. Step 3: Cross multiply
    448,552.65x = 672,737.22 × 128,618.81
  4. Step 4: Simplify right side
    448,552.65x = 86,526,662,092.00
  5. Step 5: Solve for x
    x = 86,526,662,092.00/448,552.65
  6. Step 6: Final answer
    x = 192,901.91

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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.