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Finding the Fourth Proportional to 320,245.49, 480,376.69 and 140,238.30

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Solution

The fourth proportional to 320,245.49, 480,376.69 and 140,238.30 is: 210,361.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,245.49 : 480,376.69 = 140,238.30 : x
  2. Step 2: Convert to fraction form
    320,245.49/480,376.69 = 140,238.30/x
  3. Step 3: Cross multiply
    320,245.49x = 480,376.69 × 140,238.30
  4. Step 4: Simplify right side
    320,245.49x = 67,367,209,542.94
  5. Step 5: Solve for x
    x = 67,367,209,542.94/320,245.49
  6. Step 6: Final answer
    x = 210,361.15

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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.