Home / 391,895.10-540,836.63-219,867.54

Finding the Fourth Proportional to 391,895.10, 540,836.63 and 219,867.54

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Solution

The fourth proportional to 391,895.10, 540,836.63 and 219,867.54 is: 303,429.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,895.10 : 540,836.63 = 219,867.54 : x
  2. Step 2: Convert to fraction form
    391,895.10/540,836.63 = 219,867.54/x
  3. Step 3: Cross multiply
    391,895.10x = 540,836.63 × 219,867.54
  4. Step 4: Simplify right side
    391,895.10x = 118,912,419,379.99
  5. Step 5: Solve for x
    x = 118,912,419,379.99/391,895.10
  6. Step 6: Final answer
    x = 303,429.21

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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.