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Finding the Fourth Proportional to 391,245.60, 586,722.60 and 272,564.40

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Solution

The fourth proportional to 391,245.60, 586,722.60 and 272,564.40 is: 408,745.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,245.60 : 586,722.60 = 272,564.40 : x
  2. Step 2: Convert to fraction form
    391,245.60/586,722.60 = 272,564.40/x
  3. Step 3: Cross multiply
    391,245.60x = 586,722.60 × 272,564.40
  4. Step 4: Simplify right side
    391,245.60x = 159,919,693,435.44
  5. Step 5: Solve for x
    x = 159,919,693,435.44/391,245.60
  6. Step 6: Final answer
    x = 408,745.03

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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.