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Finding the Fourth Proportional to 487,689.26, 731,382.06 and 172,072.22

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Solution

The fourth proportional to 487,689.26, 731,382.06 and 172,072.22 is: 258,054.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,689.26 : 731,382.06 = 172,072.22 : x
  2. Step 2: Convert to fraction form
    487,689.26/731,382.06 = 172,072.22/x
  3. Step 3: Cross multiply
    487,689.26x = 731,382.06 × 172,072.22
  4. Step 4: Simplify right side
    487,689.26x = 125,850,534,732.37
  5. Step 5: Solve for x
    x = 125,850,534,732.37/487,689.26
  6. Step 6: Final answer
    x = 258,054.76

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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.