Home / 811,580.72-1,120,002.19-489,311.48

Finding the Fourth Proportional to 811,580.72, 1,120,002.19 and 489,311.48

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Solution

The fourth proportional to 811,580.72, 1,120,002.19 and 489,311.48 is: 675,262.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,580.72 : 1,120,002.19 = 489,311.48 : x
  2. Step 2: Convert to fraction form
    811,580.72/1,120,002.19 = 489,311.48/x
  3. Step 3: Cross multiply
    811,580.72x = 1,120,002.19 × 489,311.48
  4. Step 4: Simplify right side
    811,580.72x = 548,029,930,768.87
  5. Step 5: Solve for x
    x = 548,029,930,768.87/811,580.72
  6. Step 6: Final answer
    x = 675,262.39

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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.