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Finding the Fourth Proportional to 393,644.40, 590,524.20 and 127,359.60

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Solution

The fourth proportional to 393,644.40, 590,524.20 and 127,359.60 is: 191,058.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,644.40 : 590,524.20 = 127,359.60 : x
  2. Step 2: Convert to fraction form
    393,644.40/590,524.20 = 127,359.60/x
  3. Step 3: Cross multiply
    393,644.40x = 590,524.20 × 127,359.60
  4. Step 4: Simplify right side
    393,644.40x = 75,208,925,902.32
  5. Step 5: Solve for x
    x = 75,208,925,902.32/393,644.40
  6. Step 6: Final answer
    x = 191,058.04

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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.