Home / 811,968.80-1,120,493.76-449,407.52

Finding the Fourth Proportional to 811,968.80, 1,120,493.76 and 449,407.52

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Solution

The fourth proportional to 811,968.80, 1,120,493.76 and 449,407.52 is: 620,169.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,968.80 : 1,120,493.76 = 449,407.52 : x
  2. Step 2: Convert to fraction form
    811,968.80/1,120,493.76 = 449,407.52/x
  3. Step 3: Cross multiply
    811,968.80x = 1,120,493.76 × 449,407.52
  4. Step 4: Simplify right side
    811,968.80x = 503,558,321,857.08
  5. Step 5: Solve for x
    x = 503,558,321,857.08/811,968.80
  6. Step 6: Final answer
    x = 620,169.55

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1.5x scale

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.