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Finding the Fourth Proportional to 499,609.40, 749,414.10 and 447,121.40

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Solution

The fourth proportional to 499,609.40, 749,414.10 and 447,121.40 is: 670,682.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,609.40 : 749,414.10 = 447,121.40 : x
  2. Step 2: Convert to fraction form
    499,609.40/749,414.10 = 447,121.40/x
  3. Step 3: Cross multiply
    499,609.40x = 749,414.10 × 447,121.40
  4. Step 4: Simplify right side
    499,609.40x = 335,079,081,571.74
  5. Step 5: Solve for x
    x = 335,079,081,571.74/499,609.40
  6. Step 6: Final answer
    x = 670,682.10

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Double scale
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Similar ratio
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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.