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Finding the Fourth Proportional to 270,256.08, 405,379 and 80,716.99

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Solution

The fourth proportional to 270,256.08, 405,379 and 80,716.99 is: 121,073.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,256.08 : 405,379 = 80,716.99 : x
  2. Step 2: Convert to fraction form
    270,256.08/405,379 = 80,716.99/x
  3. Step 3: Cross multiply
    270,256.08x = 405,379 × 80,716.99
  4. Step 4: Simplify right side
    270,256.08x = 32,720,972,689.21
  5. Step 5: Solve for x
    x = 32,720,972,689.21/270,256.08
  6. Step 6: Final answer
    x = 121,073.96

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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.