Home / 1,321,146,078.80-1,981,719,118.20-885,789,611.60

Finding the Fourth Proportional to 1,321,146,078.80, 1,981,719,118.20 and 885,789,611.60

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Solution

The fourth proportional to 1,321,146,078.80, 1,981,719,118.20 and 885,789,611.60 is: 1,328,684,417.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,146,078.80 : 1,981,719,118.20 = 885,789,611.60 : x
  2. Step 2: Convert to fraction form
    1,321,146,078.80/1,981,719,118.20 = 885,789,611.60/x
  3. Step 3: Cross multiply
    1,321,146,078.80x = 1,981,719,118.20 × 885,789,611.60
  4. Step 4: Simplify right side
    1,321,146,078.80x = 1,755,386,208,010,672,640
  5. Step 5: Solve for x
    x = 1,755,386,208,010,672,640/1,321,146,078.80
  6. Step 6: Final answer
    x = 1,328,684,417.40

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Double scale
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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.