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Finding the Fourth Proportional to 391,308.87, 540,019.58 and 219,234.09

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Solution

The fourth proportional to 391,308.87, 540,019.58 and 219,234.09 is: 302,550.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,308.87 : 540,019.58 = 219,234.09 : x
  2. Step 2: Convert to fraction form
    391,308.87/540,019.58 = 219,234.09/x
  3. Step 3: Cross multiply
    391,308.87x = 540,019.58 × 219,234.09
  4. Step 4: Simplify right side
    391,308.87x = 118,390,701,203.48
  5. Step 5: Solve for x
    x = 118,390,701,203.48/391,308.87
  6. Step 6: Final answer
    x = 302,550.52

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