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Finding the Fourth Proportional to 419,109.76, 631,464.95 and 379,179.41

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Solution

The fourth proportional to 419,109.76, 631,464.95 and 379,179.41 is: 571,302.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,109.76 : 631,464.95 = 379,179.41 : x
  2. Step 2: Convert to fraction form
    419,109.76/631,464.95 = 379,179.41/x
  3. Step 3: Cross multiply
    419,109.76x = 631,464.95 × 379,179.41
  4. Step 4: Simplify right side
    419,109.76x = 239,438,504,491.45
  5. Step 5: Solve for x
    x = 239,438,504,491.45/419,109.76
  6. Step 6: Final answer
    x = 571,302.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.