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Finding the Fourth Proportional to 391,586.90, 540,379.42 and 230,451.44

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Solution

The fourth proportional to 391,586.90, 540,379.42 and 230,451.44 is: 318,016.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,586.90 : 540,379.42 = 230,451.44 : x
  2. Step 2: Convert to fraction form
    391,586.90/540,379.42 = 230,451.44/x
  3. Step 3: Cross multiply
    391,586.90x = 540,379.42 × 230,451.44
  4. Step 4: Simplify right side
    391,586.90x = 124,531,212,207.34
  5. Step 5: Solve for x
    x = 124,531,212,207.34/391,586.90
  6. Step 6: Final answer
    x = 318,016.80

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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.