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Finding the Fourth Proportional to 494,455.80, 739,715.40 and 428,627.10

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Solution

The fourth proportional to 494,455.80, 739,715.40 and 428,627.10 is: 641,234.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,455.80 : 739,715.40 = 428,627.10 : x
  2. Step 2: Convert to fraction form
    494,455.80/739,715.40 = 428,627.10/x
  3. Step 3: Cross multiply
    494,455.80x = 739,715.40 × 428,627.10
  4. Step 4: Simplify right side
    494,455.80x = 317,062,066,727.34
  5. Step 5: Solve for x
    x = 317,062,066,727.34/494,455.80
  6. Step 6: Final answer
    x = 641,234.40

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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.