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Finding the Fourth Proportional to 391,531.10, 587,361.45 and 166,999.10

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Solution

The fourth proportional to 391,531.10, 587,361.45 and 166,999.10 is: 250,526.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,531.10 : 587,361.45 = 166,999.10 : x
  2. Step 2: Convert to fraction form
    391,531.10/587,361.45 = 166,999.10/x
  3. Step 3: Cross multiply
    391,531.10x = 587,361.45 × 166,999.10
  4. Step 4: Simplify right side
    391,531.10x = 98,088,833,524.70
  5. Step 5: Solve for x
    x = 98,088,833,524.70/391,531.10
  6. Step 6: Final answer
    x = 250,526.29

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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.