Home / 811,791.48-1,120,430.70-489,554.04

Finding the Fourth Proportional to 811,791.48, 1,120,430.70 and 489,554.04

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Solution

The fourth proportional to 811,791.48, 1,120,430.70 and 489,554.04 is: 675,680.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,791.48 : 1,120,430.70 = 489,554.04 : x
  2. Step 2: Convert to fraction form
    811,791.48/1,120,430.70 = 489,554.04/x
  3. Step 3: Cross multiply
    811,791.48x = 1,120,430.70 × 489,554.04
  4. Step 4: Simplify right side
    811,791.48x = 548,511,375,725.03
  5. Step 5: Solve for x
    x = 548,511,375,725.03/811,791.48
  6. Step 6: Final answer
    x = 675,680.13

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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.