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Finding the Fourth Proportional to 391,315.60, 587,099.36 and 178,159.80

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Solution

The fourth proportional to 391,315.60, 587,099.36 and 178,159.80 is: 267,297.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,315.60 : 587,099.36 = 178,159.80 : x
  2. Step 2: Convert to fraction form
    391,315.60/587,099.36 = 178,159.80/x
  3. Step 3: Cross multiply
    391,315.60x = 587,099.36 × 178,159.80
  4. Step 4: Simplify right side
    391,315.60x = 104,597,504,557.73
  5. Step 5: Solve for x
    x = 104,597,504,557.73/391,315.60
  6. Step 6: Final answer
    x = 267,297.05

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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.