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Finding the Fourth Proportional to 328,079.60, 492,119.40 and 203,490.80

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Solution

The fourth proportional to 328,079.60, 492,119.40 and 203,490.80 is: 305,236.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,079.60 : 492,119.40 = 203,490.80 : x
  2. Step 2: Convert to fraction form
    328,079.60/492,119.40 = 203,490.80/x
  3. Step 3: Cross multiply
    328,079.60x = 492,119.40 × 203,490.80
  4. Step 4: Simplify right side
    328,079.60x = 100,141,770,401.52
  5. Step 5: Solve for x
    x = 100,141,770,401.52/328,079.60
  6. Step 6: Final answer
    x = 305,236.20

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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.