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Finding the Fourth Proportional to 391,524.79, 540,348.92 and 219,489.14

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Solution

The fourth proportional to 391,524.79, 540,348.92 and 219,489.14 is: 302,920.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,524.79 : 540,348.92 = 219,489.14 : x
  2. Step 2: Convert to fraction form
    391,524.79/540,348.92 = 219,489.14/x
  3. Step 3: Cross multiply
    391,524.79x = 540,348.92 × 219,489.14
  4. Step 4: Simplify right side
    391,524.79x = 118,600,722,061.87
  5. Step 5: Solve for x
    x = 118,600,722,061.87/391,524.79
  6. Step 6: Final answer
    x = 302,920.08

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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.