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Finding the Fourth Proportional to 419,171.63, 628,751.22 and 103,628.45

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Solution

The fourth proportional to 419,171.63, 628,751.22 and 103,628.45 is: 155,441.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,171.63 : 628,751.22 = 103,628.45 : x
  2. Step 2: Convert to fraction form
    419,171.63/628,751.22 = 103,628.45/x
  3. Step 3: Cross multiply
    419,171.63x = 628,751.22 × 103,628.45
  4. Step 4: Simplify right side
    419,171.63x = 65,156,514,364.21
  5. Step 5: Solve for x
    x = 65,156,514,364.21/419,171.63
  6. Step 6: Final answer
    x = 155,441.14

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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.