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Finding the Fourth Proportional to 391,504.60, 587,256.90 and 125,273.80

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Solution

The fourth proportional to 391,504.60, 587,256.90 and 125,273.80 is: 187,910.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,504.60 : 587,256.90 = 125,273.80 : x
  2. Step 2: Convert to fraction form
    391,504.60/587,256.90 = 125,273.80/x
  3. Step 3: Cross multiply
    391,504.60x = 587,256.90 × 125,273.80
  4. Step 4: Simplify right side
    391,504.60x = 73,567,903,439.22
  5. Step 5: Solve for x
    x = 73,567,903,439.22/391,504.60
  6. Step 6: Final answer
    x = 187,910.70

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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.