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Finding the Fourth Proportional to 419,709.80, 629,564.70 and 376,164.20

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Solution

The fourth proportional to 419,709.80, 629,564.70 and 376,164.20 is: 564,246.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,709.80 : 629,564.70 = 376,164.20 : x
  2. Step 2: Convert to fraction form
    419,709.80/629,564.70 = 376,164.20/x
  3. Step 3: Cross multiply
    419,709.80x = 629,564.70 × 376,164.20
  4. Step 4: Simplify right side
    419,709.80x = 236,819,701,723.74
  5. Step 5: Solve for x
    x = 236,819,701,723.74/419,709.80
  6. Step 6: Final answer
    x = 564,246.30

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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.