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Finding the Fourth Proportional to 316,456.67, 436,721.30 and 173,216.82

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Solution

The fourth proportional to 316,456.67, 436,721.30 and 173,216.82 is: 239,045.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,456.67 : 436,721.30 = 173,216.82 : x
  2. Step 2: Convert to fraction form
    316,456.67/436,721.30 = 173,216.82/x
  3. Step 3: Cross multiply
    316,456.67x = 436,721.30 × 173,216.82
  4. Step 4: Simplify right side
    316,456.67x = 75,647,474,812.27
  5. Step 5: Solve for x
    x = 75,647,474,812.27/316,456.67
  6. Step 6: Final answer
    x = 239,045.28

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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.