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Finding the Fourth Proportional to 326,907, 490,388.68 and 90,249.72

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Solution

The fourth proportional to 326,907, 490,388.68 and 90,249.72 is: 135,382.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,907 : 490,388.68 = 90,249.72 : x
  2. Step 2: Convert to fraction form
    326,907/490,388.68 = 90,249.72/x
  3. Step 3: Cross multiply
    326,907x = 490,388.68 × 90,249.72
  4. Step 4: Simplify right side
    326,907x = 44,257,441,061.17
  5. Step 5: Solve for x
    x = 44,257,441,061.17/326,907
  6. Step 6: Final answer
    x = 135,382.36

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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.