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Finding the Fourth Proportional to 447,312.21, 670,738.46 and 131,728.11

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Solution

The fourth proportional to 447,312.21, 670,738.46 and 131,728.11 is: 197,524.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,312.21 : 670,738.46 = 131,728.11 : x
  2. Step 2: Convert to fraction form
    447,312.21/670,738.46 = 131,728.11/x
  3. Step 3: Cross multiply
    447,312.21x = 670,738.46 × 131,728.11
  4. Step 4: Simplify right side
    447,312.21x = 88,355,106,466.20
  5. Step 5: Solve for x
    x = 88,355,106,466.20/447,312.21
  6. Step 6: Final answer
    x = 197,524.47

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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.