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Finding the Fourth Proportional to 645,234.30, 967,851.45 and 408,843.90

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Solution

The fourth proportional to 645,234.30, 967,851.45 and 408,843.90 is: 613,265.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,234.30 : 967,851.45 = 408,843.90 : x
  2. Step 2: Convert to fraction form
    645,234.30/967,851.45 = 408,843.90/x
  3. Step 3: Cross multiply
    645,234.30x = 967,851.45 × 408,843.90
  4. Step 4: Simplify right side
    645,234.30x = 395,700,161,438.66
  5. Step 5: Solve for x
    x = 395,700,161,438.66/645,234.30
  6. Step 6: Final answer
    x = 613,265.85

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Double scale
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Similar ratio
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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.