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Finding the Fourth Proportional to 391,088.22, 539,709.41 and 255,209.10

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Solution

The fourth proportional to 391,088.22, 539,709.41 and 255,209.10 is: 352,193.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,088.22 : 539,709.41 = 255,209.10 : x
  2. Step 2: Convert to fraction form
    391,088.22/539,709.41 = 255,209.10/x
  3. Step 3: Cross multiply
    391,088.22x = 539,709.41 × 255,209.10
  4. Step 4: Simplify right side
    391,088.22x = 137,738,751,511.59
  5. Step 5: Solve for x
    x = 137,738,751,511.59/391,088.22
  6. Step 6: Final answer
    x = 352,193.56

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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.