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Finding the Fourth Proportional to 391,504.15, 587,310.90 and 166,862.80

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Solution

The fourth proportional to 391,504.15, 587,310.90 and 166,862.80 is: 250,317.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,504.15 : 587,310.90 = 166,862.80 : x
  2. Step 2: Convert to fraction form
    391,504.15/587,310.90 = 166,862.80/x
  3. Step 3: Cross multiply
    391,504.15x = 587,310.90 × 166,862.80
  4. Step 4: Simplify right side
    391,504.15x = 98,000,341,244.52
  5. Step 5: Solve for x
    x = 98,000,341,244.52/391,504.15
  6. Step 6: Final answer
    x = 250,317.50

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1.5x scale

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.