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Finding the Fourth Proportional to 629,772.40, 944,311.92 and 430,318

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Solution

The fourth proportional to 629,772.40, 944,311.92 and 430,318 is: 645,240.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,772.40 : 944,311.92 = 430,318 : x
  2. Step 2: Convert to fraction form
    629,772.40/944,311.92 = 430,318/x
  3. Step 3: Cross multiply
    629,772.40x = 944,311.92 × 430,318
  4. Step 4: Simplify right side
    629,772.40x = 406,354,416,790.56
  5. Step 5: Solve for x
    x = 406,354,416,790.56/629,772.40
  6. Step 6: Final answer
    x = 645,240.12

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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.