Home / 769,516.81-1,061,914.66-420,641.71

Finding the Fourth Proportional to 769,516.81, 1,061,914.66 and 420,641.71

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Solution

The fourth proportional to 769,516.81, 1,061,914.66 and 420,641.71 is: 580,475.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,516.81 : 1,061,914.66 = 420,641.71 : x
  2. Step 2: Convert to fraction form
    769,516.81/1,061,914.66 = 420,641.71/x
  3. Step 3: Cross multiply
    769,516.81x = 1,061,914.66 × 420,641.71
  4. Step 4: Simplify right side
    769,516.81x = 446,685,594,750.08
  5. Step 5: Solve for x
    x = 446,685,594,750.08/769,516.81
  6. Step 6: Final answer
    x = 580,475.42

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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.