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Finding the Fourth Proportional to 392,605.20, 589,782.60 and 376,664.40

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Solution

The fourth proportional to 392,605.20, 589,782.60 and 376,664.40 is: 565,835.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,605.20 : 589,782.60 = 376,664.40 : x
  2. Step 2: Convert to fraction form
    392,605.20/589,782.60 = 376,664.40/x
  3. Step 3: Cross multiply
    392,605.20x = 589,782.60 × 376,664.40
  4. Step 4: Simplify right side
    392,605.20x = 222,150,109,159.44
  5. Step 5: Solve for x
    x = 222,150,109,159.44/392,605.20
  6. Step 6: Final answer
    x = 565,835.88

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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.