Home / 643,946.60-965,535.90-394,807.40

Finding the Fourth Proportional to 643,946.60, 965,535.90 and 394,807.40

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Solution

The fourth proportional to 643,946.60, 965,535.90 and 394,807.40 is: 591,975.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,946.60 : 965,535.90 = 394,807.40 : x
  2. Step 2: Convert to fraction form
    643,946.60/965,535.90 = 394,807.40/x
  3. Step 3: Cross multiply
    643,946.60x = 965,535.90 × 394,807.40
  4. Step 4: Simplify right side
    643,946.60x = 381,200,718,285.66
  5. Step 5: Solve for x
    x = 381,200,718,285.66/643,946.60
  6. Step 6: Final answer
    x = 591,975.67

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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.