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Finding the Fourth Proportional to 647,480.50, 971,309.39 and 220,901.80

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Solution

The fourth proportional to 647,480.50, 971,309.39 and 220,901.80 is: 331,382.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,480.50 : 971,309.39 = 220,901.80 : x
  2. Step 2: Convert to fraction form
    647,480.50/971,309.39 = 220,901.80/x
  3. Step 3: Cross multiply
    647,480.50x = 971,309.39 × 220,901.80
  4. Step 4: Simplify right side
    647,480.50x = 214,563,992,607.90
  5. Step 5: Solve for x
    x = 214,563,992,607.90/647,480.50
  6. Step 6: Final answer
    x = 331,382.94

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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.