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Finding the Fourth Proportional to 647,993.80, 971,990.70 and 227,117.80

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Solution

The fourth proportional to 647,993.80, 971,990.70 and 227,117.80 is: 340,676.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,993.80 : 971,990.70 = 227,117.80 : x
  2. Step 2: Convert to fraction form
    647,993.80/971,990.70 = 227,117.80/x
  3. Step 3: Cross multiply
    647,993.80x = 971,990.70 × 227,117.80
  4. Step 4: Simplify right side
    647,993.80x = 220,756,389,404.46
  5. Step 5: Solve for x
    x = 220,756,389,404.46/647,993.80
  6. Step 6: Final answer
    x = 340,676.70

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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.