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Finding the Fourth Proportional to 391,118.58, 539,699.04 and 219,012.62

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Solution

The fourth proportional to 391,118.58, 539,699.04 and 219,012.62 is: 302,212.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,118.58 : 539,699.04 = 219,012.62 : x
  2. Step 2: Convert to fraction form
    391,118.58/539,699.04 = 219,012.62/x
  3. Step 3: Cross multiply
    391,118.58x = 539,699.04 × 219,012.62
  4. Step 4: Simplify right side
    391,118.58x = 118,200,898,063.39
  5. Step 5: Solve for x
    x = 118,200,898,063.39/391,118.58
  6. Step 6: Final answer
    x = 302,212.43

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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.