Home / 643,942.89-965,520.50-307,086.57

Finding the Fourth Proportional to 643,942.89, 965,520.50 and 307,086.57

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Solution

The fourth proportional to 643,942.89, 965,520.50 and 307,086.57 is: 460,442.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,942.89 : 965,520.50 = 307,086.57 : x
  2. Step 2: Convert to fraction form
    643,942.89/965,520.50 = 307,086.57/x
  3. Step 3: Cross multiply
    643,942.89x = 965,520.50 × 307,086.57
  4. Step 4: Simplify right side
    643,942.89x = 296,498,377,074.25
  5. Step 5: Solve for x
    x = 296,498,377,074.25/643,942.89
  6. Step 6: Final answer
    x = 460,442.04

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.