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Finding the Fourth Proportional to 303,987.78, 455,735.70 and 126,628.02

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Solution

The fourth proportional to 303,987.78, 455,735.70 and 126,628.02 is: 189,839.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,987.78 : 455,735.70 = 126,628.02 : x
  2. Step 2: Convert to fraction form
    303,987.78/455,735.70 = 126,628.02/x
  3. Step 3: Cross multiply
    303,987.78x = 455,735.70 × 126,628.02
  4. Step 4: Simplify right side
    303,987.78x = 57,708,909,334.31
  5. Step 5: Solve for x
    x = 57,708,909,334.31/303,987.78
  6. Step 6: Final answer
    x = 189,839.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.