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Finding the Fourth Proportional to 391,623.60, 587,435.40 and 267,207.60

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Solution

The fourth proportional to 391,623.60, 587,435.40 and 267,207.60 is: 400,811.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,623.60 : 587,435.40 = 267,207.60 : x
  2. Step 2: Convert to fraction form
    391,623.60/587,435.40 = 267,207.60/x
  3. Step 3: Cross multiply
    391,623.60x = 587,435.40 × 267,207.60
  4. Step 4: Simplify right side
    391,623.60x = 156,967,203,389.04
  5. Step 5: Solve for x
    x = 156,967,203,389.04/391,623.60
  6. Step 6: Final answer
    x = 400,811.40

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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.