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Finding the Fourth Proportional to 313,591, 432,755.58 and 172,279

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Solution

The fourth proportional to 313,591, 432,755.58 and 172,279 is: 237,745.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,591 : 432,755.58 = 172,279 : x
  2. Step 2: Convert to fraction form
    313,591/432,755.58 = 172,279/x
  3. Step 3: Cross multiply
    313,591x = 432,755.58 × 172,279
  4. Step 4: Simplify right side
    313,591x = 74,554,698,566.82
  5. Step 5: Solve for x
    x = 74,554,698,566.82/313,591
  6. Step 6: Final answer
    x = 237,745.02

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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.