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Finding the Fourth Proportional to 391,696.80, 587,739.60 and 223,346.40

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Solution

The fourth proportional to 391,696.80, 587,739.60 and 223,346.40 is: 335,130.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,696.80 : 587,739.60 = 223,346.40 : x
  2. Step 2: Convert to fraction form
    391,696.80/587,739.60 = 223,346.40/x
  3. Step 3: Cross multiply
    391,696.80x = 587,739.60 × 223,346.40
  4. Step 4: Simplify right side
    391,696.80x = 131,269,523,797.44
  5. Step 5: Solve for x
    x = 131,269,523,797.44/391,696.80
  6. Step 6: Final answer
    x = 335,130.45

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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.