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Finding the Fourth Proportional to 447,216.80, 670,630.80 and 131,608.40

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Solution

The fourth proportional to 447,216.80, 670,630.80 and 131,608.40 is: 197,355.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,216.80 : 670,630.80 = 131,608.40 : x
  2. Step 2: Convert to fraction form
    447,216.80/670,630.80 = 131,608.40/x
  3. Step 3: Cross multiply
    447,216.80x = 670,630.80 × 131,608.40
  4. Step 4: Simplify right side
    447,216.80x = 88,260,646,578.72
  5. Step 5: Solve for x
    x = 88,260,646,578.72/447,216.80
  6. Step 6: Final answer
    x = 197,355.39

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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.