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Finding the Fourth Proportional to 393,054.40, 589,581.60 and 251,336.80

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Solution

The fourth proportional to 393,054.40, 589,581.60 and 251,336.80 is: 377,005.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,054.40 : 589,581.60 = 251,336.80 : x
  2. Step 2: Convert to fraction form
    393,054.40/589,581.60 = 251,336.80/x
  3. Step 3: Cross multiply
    393,054.40x = 589,581.60 × 251,336.80
  4. Step 4: Simplify right side
    393,054.40x = 148,183,552,682.88
  5. Step 5: Solve for x
    x = 148,183,552,682.88/393,054.40
  6. Step 6: Final answer
    x = 377,005.20

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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.