Home / 811,935.60-1,120,443.42-449,374.80

Finding the Fourth Proportional to 811,935.60, 1,120,443.42 and 449,374.80

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Solution

The fourth proportional to 811,935.60, 1,120,443.42 and 449,374.80 is: 620,121.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,935.60 : 1,120,443.42 = 449,374.80 : x
  2. Step 2: Convert to fraction form
    811,935.60/1,120,443.42 = 449,374.80/x
  3. Step 3: Cross multiply
    811,935.60x = 1,120,443.42 × 449,374.80
  4. Step 4: Simplify right side
    811,935.60x = 503,499,037,773.82
  5. Step 5: Solve for x
    x = 503,499,037,773.82/811,935.60
  6. Step 6: Final answer
    x = 620,121.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.