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Finding the Fourth Proportional to 391,020.66, 539,593.56 and 218,922.53

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Solution

The fourth proportional to 391,020.66, 539,593.56 and 218,922.53 is: 302,104.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,020.66 : 539,593.56 = 218,922.53 : x
  2. Step 2: Convert to fraction form
    391,020.66/539,593.56 = 218,922.53/x
  3. Step 3: Cross multiply
    391,020.66x = 539,593.56 × 218,922.53
  4. Step 4: Simplify right side
    391,020.66x = 118,129,184,628.94
  5. Step 5: Solve for x
    x = 118,129,184,628.94/391,020.66
  6. Step 6: Final answer
    x = 302,104.71

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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.