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Finding the Fourth Proportional to 391,603.88, 587,446.83 and 166,988.05

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Solution

The fourth proportional to 391,603.88, 587,446.83 and 166,988.05 is: 250,499.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,603.88 : 587,446.83 = 166,988.05 : x
  2. Step 2: Convert to fraction form
    391,603.88/587,446.83 = 166,988.05/x
  3. Step 3: Cross multiply
    391,603.88x = 587,446.83 × 166,988.05
  4. Step 4: Simplify right side
    391,603.88x = 98,096,599,151.76
  5. Step 5: Solve for x
    x = 98,096,599,151.76/391,603.88
  6. Step 6: Final answer
    x = 250,499.56

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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.