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Finding the Fourth Proportional to 391,671.15, 587,561.40 and 167,029.80

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Solution

The fourth proportional to 391,671.15, 587,561.40 and 167,029.80 is: 250,568.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,671.15 : 587,561.40 = 167,029.80 : x
  2. Step 2: Convert to fraction form
    391,671.15/587,561.40 = 167,029.80/x
  3. Step 3: Cross multiply
    391,671.15x = 587,561.40 × 167,029.80
  4. Step 4: Simplify right side
    391,671.15x = 98,140,263,129.72
  5. Step 5: Solve for x
    x = 98,140,263,129.72/391,671.15
  6. Step 6: Final answer
    x = 250,568.02

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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.