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Finding the Fourth Proportional to 645,310.40, 967,965.60 and 329,662.40

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Solution

The fourth proportional to 645,310.40, 967,965.60 and 329,662.40 is: 494,493.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,310.40 : 967,965.60 = 329,662.40 : x
  2. Step 2: Convert to fraction form
    645,310.40/967,965.60 = 329,662.40/x
  3. Step 3: Cross multiply
    645,310.40x = 967,965.60 × 329,662.40
  4. Step 4: Simplify right side
    645,310.40x = 319,101,862,813.44
  5. Step 5: Solve for x
    x = 319,101,862,813.44/645,310.40
  6. Step 6: Final answer
    x = 494,493.60

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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.