Home / 1,321,046,515.80-1,981,569,773.70-400,921,378.20

Finding the Fourth Proportional to 1,321,046,515.80, 1,981,569,773.70 and 400,921,378.20

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Solution

The fourth proportional to 1,321,046,515.80, 1,981,569,773.70 and 400,921,378.20 is: 601,382,067.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,046,515.80 : 1,981,569,773.70 = 400,921,378.20 : x
  2. Step 2: Convert to fraction form
    1,321,046,515.80/1,981,569,773.70 = 400,921,378.20/x
  3. Step 3: Cross multiply
    1,321,046,515.80x = 1,981,569,773.70 × 400,921,378.20
  4. Step 4: Simplify right side
    1,321,046,515.80x = 794,453,684,671,266,048
  5. Step 5: Solve for x
    x = 794,453,684,671,266,048/1,321,046,515.80
  6. Step 6: Final answer
    x = 601,382,067.30

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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.