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Finding the Fourth Proportional to 274,277.78, 378,538.35 and 153,425.78

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Solution

The fourth proportional to 274,277.78, 378,538.35 and 153,425.78 is: 211,747.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,277.78 : 378,538.35 = 153,425.78 : x
  2. Step 2: Convert to fraction form
    274,277.78/378,538.35 = 153,425.78/x
  3. Step 3: Cross multiply
    274,277.78x = 378,538.35 × 153,425.78
  4. Step 4: Simplify right side
    274,277.78x = 58,077,541,608.66
  5. Step 5: Solve for x
    x = 58,077,541,608.66/274,277.78
  6. Step 6: Final answer
    x = 211,747.16

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1.5x scale

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.