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Finding the Fourth Proportional to 391,315.60, 587,410.80 and 302,960.80

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Solution

The fourth proportional to 391,315.60, 587,410.80 and 302,960.80 is: 454,779.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,315.60 : 587,410.80 = 302,960.80 : x
  2. Step 2: Convert to fraction form
    391,315.60/587,410.80 = 302,960.80/x
  3. Step 3: Cross multiply
    391,315.60x = 587,410.80 × 302,960.80
  4. Step 4: Simplify right side
    391,315.60x = 177,962,445,896.64
  5. Step 5: Solve for x
    x = 177,962,445,896.64/391,315.60
  6. Step 6: Final answer
    x = 454,779.84

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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.