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Finding the Fourth Proportional to 258,382.80, 356,689.20 and 172,486.80

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Solution

The fourth proportional to 258,382.80, 356,689.20 and 172,486.80 is: 238,112.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,382.80 : 356,689.20 = 172,486.80 : x
  2. Step 2: Convert to fraction form
    258,382.80/356,689.20 = 172,486.80/x
  3. Step 3: Cross multiply
    258,382.80x = 356,689.20 × 172,486.80
  4. Step 4: Simplify right side
    258,382.80x = 61,524,178,702.56
  5. Step 5: Solve for x
    x = 61,524,178,702.56/258,382.80
  6. Step 6: Final answer
    x = 238,112.52

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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.