Home / 769,516.71-1,061,914.46-420,641.61

Finding the Fourth Proportional to 769,516.71, 1,061,914.46 and 420,641.61

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Solution

The fourth proportional to 769,516.71, 1,061,914.46 and 420,641.61 is: 580,475.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,516.71 : 1,061,914.46 = 420,641.61 : x
  2. Step 2: Convert to fraction form
    769,516.71/1,061,914.46 = 420,641.61/x
  3. Step 3: Cross multiply
    769,516.71x = 1,061,914.46 × 420,641.61
  4. Step 4: Simplify right side
    769,516.71x = 446,685,408,136.68
  5. Step 5: Solve for x
    x = 446,685,408,136.68/769,516.71
  6. Step 6: Final answer
    x = 580,475.25

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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.