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Finding the Fourth Proportional to 419,115.58, 628,667.22 and 103,572.49

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Solution

The fourth proportional to 419,115.58, 628,667.22 and 103,572.49 is: 155,357.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,115.58 : 628,667.22 = 103,572.49 : x
  2. Step 2: Convert to fraction form
    419,115.58/628,667.22 = 103,572.49/x
  3. Step 3: Cross multiply
    419,115.58x = 628,667.22 × 103,572.49
  4. Step 4: Simplify right side
    419,115.58x = 65,112,627,785.11
  5. Step 5: Solve for x
    x = 65,112,627,785.11/419,115.58
  6. Step 6: Final answer
    x = 155,357.21

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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.