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Finding the Fourth Proportional to 647,620.20, 971,430.30 and 204,330.60

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Solution

The fourth proportional to 647,620.20, 971,430.30 and 204,330.60 is: 306,495.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,620.20 : 971,430.30 = 204,330.60 : x
  2. Step 2: Convert to fraction form
    647,620.20/971,430.30 = 204,330.60/x
  3. Step 3: Cross multiply
    647,620.20x = 971,430.30 × 204,330.60
  4. Step 4: Simplify right side
    647,620.20x = 198,492,936,057.18
  5. Step 5: Solve for x
    x = 198,492,936,057.18/647,620.20
  6. Step 6: Final answer
    x = 306,495.90

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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.