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Finding the Fourth Proportional to 318,042.45, 476,419.59 and 147,021.21

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Solution

The fourth proportional to 318,042.45, 476,419.59 and 147,021.21 is: 220,234.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,042.45 : 476,419.59 = 147,021.21 : x
  2. Step 2: Convert to fraction form
    318,042.45/476,419.59 = 147,021.21/x
  3. Step 3: Cross multiply
    318,042.45x = 476,419.59 × 147,021.21
  4. Step 4: Simplify right side
    318,042.45x = 70,043,784,589.50
  5. Step 5: Solve for x
    x = 70,043,784,589.50/318,042.45
  6. Step 6: Final answer
    x = 220,234.07

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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.