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Finding the Fourth Proportional to 303,645.81, 455,106.37 and 141,321.43

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Solution

The fourth proportional to 303,645.81, 455,106.37 and 141,321.43 is: 211,813.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,645.81 : 455,106.37 = 141,321.43 : x
  2. Step 2: Convert to fraction form
    303,645.81/455,106.37 = 141,321.43/x
  3. Step 3: Cross multiply
    303,645.81x = 455,106.37 × 141,321.43
  4. Step 4: Simplify right side
    303,645.81x = 64,316,285,168.52
  5. Step 5: Solve for x
    x = 64,316,285,168.52/303,645.81
  6. Step 6: Final answer
    x = 211,813.51

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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.