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Finding the Fourth Proportional to 300,421.72, 450,470.94 and 120,416.80

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Solution

The fourth proportional to 300,421.72, 450,470.94 and 120,416.80 is: 180,560.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,421.72 : 450,470.94 = 120,416.80 : x
  2. Step 2: Convert to fraction form
    300,421.72/450,470.94 = 120,416.80/x
  3. Step 3: Cross multiply
    300,421.72x = 450,470.94 × 120,416.80
  4. Step 4: Simplify right side
    300,421.72x = 54,244,269,087.79
  5. Step 5: Solve for x
    x = 54,244,269,087.79/300,421.72
  6. Step 6: Final answer
    x = 180,560.41

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1.5x scale

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.