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Finding the Fourth Proportional to 474,096.80, 711,145.20 and 399,447.20

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Solution

The fourth proportional to 474,096.80, 711,145.20 and 399,447.20 is: 599,170.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    474,096.80 : 711,145.20 = 399,447.20 : x
  2. Step 2: Convert to fraction form
    474,096.80/711,145.20 = 399,447.20/x
  3. Step 3: Cross multiply
    474,096.80x = 711,145.20 × 399,447.20
  4. Step 4: Simplify right side
    474,096.80x = 284,064,958,933.44
  5. Step 5: Solve for x
    x = 284,064,958,933.44/474,096.80
  6. Step 6: Final answer
    x = 599,170.80

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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.