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Finding the Fourth Proportional to 274,707.87, 379,078.80 and 153,821.45

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Solution

The fourth proportional to 274,707.87, 379,078.80 and 153,821.45 is: 212,263.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,707.87 : 379,078.80 = 153,821.45 : x
  2. Step 2: Convert to fraction form
    274,707.87/379,078.80 = 153,821.45/x
  3. Step 3: Cross multiply
    274,707.87x = 379,078.80 × 153,821.45
  4. Step 4: Simplify right side
    274,707.87x = 58,310,448,784.87
  5. Step 5: Solve for x
    x = 58,310,448,784.87/274,707.87
  6. Step 6: Final answer
    x = 212,263.48

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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.