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Finding the Fourth Proportional to 419,222.40, 628,776.90 and 166,688.70

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Solution

The fourth proportional to 419,222.40, 628,776.90 and 166,688.70 is: 250,010.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,222.40 : 628,776.90 = 166,688.70 : x
  2. Step 2: Convert to fraction form
    419,222.40/628,776.90 = 166,688.70/x
  3. Step 3: Cross multiply
    419,222.40x = 628,776.90 × 166,688.70
  4. Step 4: Simplify right side
    419,222.40x = 104,810,004,051.03
  5. Step 5: Solve for x
    x = 104,810,004,051.03/419,222.40
  6. Step 6: Final answer
    x = 250,010.51

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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.