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Finding the Fourth Proportional to 391,230.54, 539,905.03 and 219,147.05

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Solution

The fourth proportional to 391,230.54, 539,905.03 and 219,147.05 is: 302,426.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,230.54 : 539,905.03 = 219,147.05 : x
  2. Step 2: Convert to fraction form
    391,230.54/539,905.03 = 219,147.05/x
  3. Step 3: Cross multiply
    391,230.54x = 539,905.03 × 219,147.05
  4. Step 4: Simplify right side
    391,230.54x = 118,318,595,406.56
  5. Step 5: Solve for x
    x = 118,318,595,406.56/391,230.54
  6. Step 6: Final answer
    x = 302,426.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.