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Finding the Fourth Proportional to 391,781.75, 587,673.54 and 107,476.43

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Solution

The fourth proportional to 391,781.75, 587,673.54 and 107,476.43 is: 161,214.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,781.75 : 587,673.54 = 107,476.43 : x
  2. Step 2: Convert to fraction form
    391,781.75/587,673.54 = 107,476.43/x
  3. Step 3: Cross multiply
    391,781.75x = 587,673.54 × 107,476.43
  4. Step 4: Simplify right side
    391,781.75x = 63,161,051,146.29
  5. Step 5: Solve for x
    x = 63,161,051,146.29/391,781.75
  6. Step 6: Final answer
    x = 161,214.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.