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Finding the Fourth Proportional to 391,015.20, 586,405.80 and 203,924.64

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Solution

The fourth proportional to 391,015.20, 586,405.80 and 203,924.64 is: 305,825.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,015.20 : 586,405.80 = 203,924.64 : x
  2. Step 2: Convert to fraction form
    391,015.20/586,405.80 = 203,924.64/x
  3. Step 3: Cross multiply
    391,015.20x = 586,405.80 × 203,924.64
  4. Step 4: Simplify right side
    391,015.20x = 119,582,591,658.91
  5. Step 5: Solve for x
    x = 119,582,591,658.91/391,015.20
  6. Step 6: Final answer
    x = 305,825.94

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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.