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Finding the Fourth Proportional to 274,610.25, 378,967.91 and 155,378.25

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Solution

The fourth proportional to 274,610.25, 378,967.91 and 155,378.25 is: 214,425.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,610.25 : 378,967.91 = 155,378.25 : x
  2. Step 2: Convert to fraction form
    274,610.25/378,967.91 = 155,378.25/x
  3. Step 3: Cross multiply
    274,610.25x = 378,967.91 × 155,378.25
  4. Step 4: Simplify right side
    274,610.25x = 58,883,369,885.07
  5. Step 5: Solve for x
    x = 58,883,369,885.07/274,610.25
  6. Step 6: Final answer
    x = 214,425.24

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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.