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Finding the Fourth Proportional to 274,959.88, 379,449.12 and 154,128.04

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Solution

The fourth proportional to 274,959.88, 379,449.12 and 154,128.04 is: 212,699.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,959.88 : 379,449.12 = 154,128.04 : x
  2. Step 2: Convert to fraction form
    274,959.88/379,449.12 = 154,128.04/x
  3. Step 3: Cross multiply
    274,959.88x = 379,449.12 × 154,128.04
  4. Step 4: Simplify right side
    274,959.88x = 58,483,749,145.32
  5. Step 5: Solve for x
    x = 58,483,749,145.32/274,959.88
  6. Step 6: Final answer
    x = 212,699.21

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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.