Home / 813,640.74-1,220,321.68-214,607.77

Finding the Fourth Proportional to 813,640.74, 1,220,321.68 and 214,607.77

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Solution

The fourth proportional to 813,640.74, 1,220,321.68 and 214,607.77 is: 321,874.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,640.74 : 1,220,321.68 = 214,607.77 : x
  2. Step 2: Convert to fraction form
    813,640.74/1,220,321.68 = 214,607.77/x
  3. Step 3: Cross multiply
    813,640.74x = 1,220,321.68 × 214,607.77
  4. Step 4: Simplify right side
    813,640.74x = 261,890,514,427.45
  5. Step 5: Solve for x
    x = 261,890,514,427.45/813,640.74
  6. Step 6: Final answer
    x = 321,874.88

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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.