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Finding the Fourth Proportional to 680,555.98, 939,221.49 and 394,081.12

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Solution

The fourth proportional to 680,555.98, 939,221.49 and 394,081.12 is: 543,863.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,555.98 : 939,221.49 = 394,081.12 : x
  2. Step 2: Convert to fraction form
    680,555.98/939,221.49 = 394,081.12/x
  3. Step 3: Cross multiply
    680,555.98x = 939,221.49 × 394,081.12
  4. Step 4: Simplify right side
    680,555.98x = 370,129,456,707.27
  5. Step 5: Solve for x
    x = 370,129,456,707.27/680,555.98
  6. Step 6: Final answer
    x = 543,863.35

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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.