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Finding the Fourth Proportional to 313,929.20, 470,116.20 and 251,721.20

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Solution

The fourth proportional to 313,929.20, 470,116.20 and 251,721.20 is: 376,958.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,929.20 : 470,116.20 = 251,721.20 : x
  2. Step 2: Convert to fraction form
    313,929.20/470,116.20 = 251,721.20/x
  3. Step 3: Cross multiply
    313,929.20x = 470,116.20 × 251,721.20
  4. Step 4: Simplify right side
    313,929.20x = 118,338,214,003.44
  5. Step 5: Solve for x
    x = 118,338,214,003.44/313,929.20
  6. Step 6: Final answer
    x = 376,958.29

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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.