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Finding the Fourth Proportional to 680,559.48, 939,226.32 and 394,084.62

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Solution

The fourth proportional to 680,559.48, 939,226.32 and 394,084.62 is: 543,868.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,559.48 : 939,226.32 = 394,084.62 : x
  2. Step 2: Convert to fraction form
    680,559.48/939,226.32 = 394,084.62/x
  3. Step 3: Cross multiply
    680,559.48x = 939,226.32 × 394,084.62
  4. Step 4: Simplify right side
    680,559.48x = 370,134,647,411.20
  5. Step 5: Solve for x
    x = 370,134,647,411.20/680,559.48
  6. Step 6: Final answer
    x = 543,868.18

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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.