Home / 1,278,794,385.80-1,918,191,578.70-865,545,864.20

Finding the Fourth Proportional to 1,278,794,385.80, 1,918,191,578.70 and 865,545,864.20

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Solution

The fourth proportional to 1,278,794,385.80, 1,918,191,578.70 and 865,545,864.20 is: 1,298,318,796.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,794,385.80 : 1,918,191,578.70 = 865,545,864.20 : x
  2. Step 2: Convert to fraction form
    1,278,794,385.80/1,918,191,578.70 = 865,545,864.20/x
  3. Step 3: Cross multiply
    1,278,794,385.80x = 1,918,191,578.70 × 865,545,864.20
  4. Step 4: Simplify right side
    1,278,794,385.80x = 1,660,282,787,687,053,824
  5. Step 5: Solve for x
    x = 1,660,282,787,687,053,824/1,278,794,385.80
  6. Step 6: Final answer
    x = 1,298,318,796.30

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Double scale
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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.