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Finding the Fourth Proportional to 392,479.20, 589,593.60 and 376,538.40

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Solution

The fourth proportional to 392,479.20, 589,593.60 and 376,538.40 is: 565,646.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,479.20 : 589,593.60 = 376,538.40 : x
  2. Step 2: Convert to fraction form
    392,479.20/589,593.60 = 376,538.40/x
  3. Step 3: Cross multiply
    392,479.20x = 589,593.60 × 376,538.40
  4. Step 4: Simplify right side
    392,479.20x = 222,004,630,794.24
  5. Step 5: Solve for x
    x = 222,004,630,794.24/392,479.20
  6. Step 6: Final answer
    x = 565,646.87

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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.