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Finding the Fourth Proportional to 275,146.56, 379,697.76 and 154,287.72

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Solution

The fourth proportional to 275,146.56, 379,697.76 and 154,287.72 is: 212,914.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,146.56 : 379,697.76 = 154,287.72 : x
  2. Step 2: Convert to fraction form
    275,146.56/379,697.76 = 154,287.72/x
  3. Step 3: Cross multiply
    275,146.56x = 379,697.76 × 154,287.72
  4. Step 4: Simplify right side
    275,146.56x = 58,582,701,679.51
  5. Step 5: Solve for x
    x = 58,582,701,679.51/275,146.56
  6. Step 6: Final answer
    x = 212,914.53

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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.