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Finding the Fourth Proportional to 391,450.60, 587,175.90 and 204,519.40

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Solution

The fourth proportional to 391,450.60, 587,175.90 and 204,519.40 is: 306,779.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,450.60 : 587,175.90 = 204,519.40 : x
  2. Step 2: Convert to fraction form
    391,450.60/587,175.90 = 204,519.40/x
  3. Step 3: Cross multiply
    391,450.60x = 587,175.90 × 204,519.40
  4. Step 4: Simplify right side
    391,450.60x = 120,088,862,762.46
  5. Step 5: Solve for x
    x = 120,088,862,762.46/391,450.60
  6. Step 6: Final answer
    x = 306,779.10

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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.