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Finding the Fourth Proportional to 275,287.01, 379,929.39 and 154,405.45

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Solution

The fourth proportional to 275,287.01, 379,929.39 and 154,405.45 is: 213,098.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,287.01 : 379,929.39 = 154,405.45 : x
  2. Step 2: Convert to fraction form
    275,287.01/379,929.39 = 154,405.45/x
  3. Step 3: Cross multiply
    275,287.01x = 379,929.39 × 154,405.45
  4. Step 4: Simplify right side
    275,287.01x = 58,663,168,431.18
  5. Step 5: Solve for x
    x = 58,663,168,431.18/275,287.01
  6. Step 6: Final answer
    x = 213,098.21

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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.