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Finding the Fourth Proportional to 418,578.32, 627,996.96 and 145,047.80

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Solution

The fourth proportional to 418,578.32, 627,996.96 and 145,047.80 is: 217,616.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,578.32 : 627,996.96 = 145,047.80 : x
  2. Step 2: Convert to fraction form
    418,578.32/627,996.96 = 145,047.80/x
  3. Step 3: Cross multiply
    418,578.32x = 627,996.96 × 145,047.80
  4. Step 4: Simplify right side
    418,578.32x = 91,089,577,454.69
  5. Step 5: Solve for x
    x = 91,089,577,454.69/418,578.32
  6. Step 6: Final answer
    x = 217,616.57

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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.