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Finding the Fourth Proportional to 391,416.59, 587,238.69 and 163,819.59

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Solution

The fourth proportional to 391,416.59, 587,238.69 and 163,819.59 is: 245,777.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,416.59 : 587,238.69 = 163,819.59 : x
  2. Step 2: Convert to fraction form
    391,416.59/587,238.69 = 163,819.59/x
  3. Step 3: Cross multiply
    391,416.59x = 587,238.69 × 163,819.59
  4. Step 4: Simplify right side
    391,416.59x = 96,201,201,427.94
  5. Step 5: Solve for x
    x = 96,201,201,427.94/391,416.59
  6. Step 6: Final answer
    x = 245,777.02

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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.