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Finding the Fourth Proportional to 391,423.32, 587,135.04 and 110,940.60

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Solution

The fourth proportional to 391,423.32, 587,135.04 and 110,940.60 is: 166,410.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,423.32 : 587,135.04 = 110,940.60 : x
  2. Step 2: Convert to fraction form
    391,423.32/587,135.04 = 110,940.60/x
  3. Step 3: Cross multiply
    391,423.32x = 587,135.04 × 110,940.60
  4. Step 4: Simplify right side
    391,423.32x = 65,137,113,618.62
  5. Step 5: Solve for x
    x = 65,137,113,618.62/391,423.32
  6. Step 6: Final answer
    x = 166,410.92

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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.