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Finding the Fourth Proportional to 419,263.82, 628,888.29 and 103,720.70

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Solution

The fourth proportional to 419,263.82, 628,888.29 and 103,720.70 is: 155,579.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,263.82 : 628,888.29 = 103,720.70 : x
  2. Step 2: Convert to fraction form
    419,263.82/628,888.29 = 103,720.70/x
  3. Step 3: Cross multiply
    419,263.82x = 628,888.29 × 103,720.70
  4. Step 4: Simplify right side
    419,263.82x = 65,228,733,660.60
  5. Step 5: Solve for x
    x = 65,228,733,660.60/419,263.82
  6. Step 6: Final answer
    x = 155,579.21

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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.