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Finding the Fourth Proportional to 391,570.40, 587,136.90 and 166,892.60

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Solution

The fourth proportional to 391,570.40, 587,136.90 and 166,892.60 is: 250,245.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,570.40 : 587,136.90 = 166,892.60 : x
  2. Step 2: Convert to fraction form
    391,570.40/587,136.90 = 166,892.60/x
  3. Step 3: Cross multiply
    391,570.40x = 587,136.90 × 166,892.60
  4. Step 4: Simplify right side
    391,570.40x = 97,988,803,796.94
  5. Step 5: Solve for x
    x = 97,988,803,796.94/391,570.40
  6. Step 6: Final answer
    x = 250,245.69

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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.