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Finding the Fourth Proportional to 395,085.84, 545,467.68 and 274,188.48

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Solution

The fourth proportional to 395,085.84, 545,467.68 and 274,188.48 is: 378,553.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,085.84 : 545,467.68 = 274,188.48 : x
  2. Step 2: Convert to fraction form
    395,085.84/545,467.68 = 274,188.48/x
  3. Step 3: Cross multiply
    395,085.84x = 545,467.68 × 274,188.48
  4. Step 4: Simplify right side
    395,085.84x = 149,560,954,068.33
  5. Step 5: Solve for x
    x = 149,560,954,068.33/395,085.84
  6. Step 6: Final answer
    x = 378,553.06

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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.