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Finding the Fourth Proportional to 391,343.30, 587,090.28 and 166,699.52

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Solution

The fourth proportional to 391,343.30, 587,090.28 and 166,699.52 is: 250,081.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,343.30 : 587,090.28 = 166,699.52 : x
  2. Step 2: Convert to fraction form
    391,343.30/587,090.28 = 166,699.52/x
  3. Step 3: Cross multiply
    391,343.30x = 587,090.28 × 166,699.52
  4. Step 4: Simplify right side
    391,343.30x = 97,867,667,872.67
  5. Step 5: Solve for x
    x = 97,867,667,872.67/391,343.30
  6. Step 6: Final answer
    x = 250,081.37

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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.