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Finding the Fourth Proportional to 303,988.71, 455,736.87 and 126,628.49

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Solution

The fourth proportional to 303,988.71, 455,736.87 and 126,628.49 is: 189,840.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,988.71 : 455,736.87 = 126,628.49 : x
  2. Step 2: Convert to fraction form
    303,988.71/455,736.87 = 126,628.49/x
  3. Step 3: Cross multiply
    303,988.71x = 455,736.87 × 126,628.49
  4. Step 4: Simplify right side
    303,988.71x = 57,709,269,406.74
  5. Step 5: Solve for x
    x = 57,709,269,406.74/303,988.71
  6. Step 6: Final answer
    x = 189,840.17

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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.