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Finding the Fourth Proportional to 505,072.80, 756,226.80 and 394,480.80

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Solution

The fourth proportional to 505,072.80, 756,226.80 and 394,480.80 is: 590,641.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,072.80 : 756,226.80 = 394,480.80 : x
  2. Step 2: Convert to fraction form
    505,072.80/756,226.80 = 394,480.80/x
  3. Step 3: Cross multiply
    505,072.80x = 756,226.80 × 394,480.80
  4. Step 4: Simplify right side
    505,072.80x = 298,316,953,045.44
  5. Step 5: Solve for x
    x = 298,316,953,045.44/505,072.80
  6. Step 6: Final answer
    x = 590,641.49

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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.