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Finding the Fourth Proportional to 911,286.80, 1,366,930.20 and 378,630.80

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Solution

The fourth proportional to 911,286.80, 1,366,930.20 and 378,630.80 is: 567,946.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,286.80 : 1,366,930.20 = 378,630.80 : x
  2. Step 2: Convert to fraction form
    911,286.80/1,366,930.20 = 378,630.80/x
  3. Step 3: Cross multiply
    911,286.80x = 1,366,930.20 × 378,630.80
  4. Step 4: Simplify right side
    911,286.80x = 517,561,875,170.16
  5. Step 5: Solve for x
    x = 517,561,875,170.16/911,286.80
  6. Step 6: Final answer
    x = 567,946.20

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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.