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Finding the Fourth Proportional to 391,857.44, 540,769.19 and 219,813.54

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Solution

The fourth proportional to 391,857.44, 540,769.19 and 219,813.54 is: 303,346.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,857.44 : 540,769.19 = 219,813.54 : x
  2. Step 2: Convert to fraction form
    391,857.44/540,769.19 = 219,813.54/x
  3. Step 3: Cross multiply
    391,857.44x = 540,769.19 × 219,813.54
  4. Step 4: Simplify right side
    391,857.44x = 118,868,390,114.22
  5. Step 5: Solve for x
    x = 118,868,390,114.22/391,857.44
  6. Step 6: Final answer
    x = 303,346.01

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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.