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Finding the Fourth Proportional to 391,798.95, 587,919.87 and 167,138.16

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Solution

The fourth proportional to 391,798.95, 587,919.87 and 167,138.16 is: 250,801.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,798.95 : 587,919.87 = 167,138.16 : x
  2. Step 2: Convert to fraction form
    391,798.95/587,919.87 = 167,138.16/x
  3. Step 3: Cross multiply
    391,798.95x = 587,919.87 × 167,138.16
  4. Step 4: Simplify right side
    391,798.95x = 98,263,845,299.24
  5. Step 5: Solve for x
    x = 98,263,845,299.24/391,798.95
  6. Step 6: Final answer
    x = 250,801.71

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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.