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Finding the Fourth Proportional to 511,143.51, 705,382.81 and 281,708.98

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Solution

The fourth proportional to 511,143.51, 705,382.81 and 281,708.98 is: 388,761.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,143.51 : 705,382.81 = 281,708.98 : x
  2. Step 2: Convert to fraction form
    511,143.51/705,382.81 = 281,708.98/x
  3. Step 3: Cross multiply
    511,143.51x = 705,382.81 × 281,708.98
  4. Step 4: Simplify right side
    511,143.51x = 198,712,671,914.63
  5. Step 5: Solve for x
    x = 198,712,671,914.63/511,143.51
  6. Step 6: Final answer
    x = 388,761.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.