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Finding the Fourth Proportional to 647,551.20, 971,326.80 and 204,261.60

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Solution

The fourth proportional to 647,551.20, 971,326.80 and 204,261.60 is: 306,392.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,551.20 : 971,326.80 = 204,261.60 : x
  2. Step 2: Convert to fraction form
    647,551.20/971,326.80 = 204,261.60/x
  3. Step 3: Cross multiply
    647,551.20x = 971,326.80 × 204,261.60
  4. Step 4: Simplify right side
    647,551.20x = 198,404,766,290.88
  5. Step 5: Solve for x
    x = 198,404,766,290.88/647,551.20
  6. Step 6: Final answer
    x = 306,392.40

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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.