Home / 643,917.20-965,875.80-288,942.80

Finding the Fourth Proportional to 643,917.20, 965,875.80 and 288,942.80

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Solution

The fourth proportional to 643,917.20, 965,875.80 and 288,942.80 is: 433,414.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,917.20 : 965,875.80 = 288,942.80 : x
  2. Step 2: Convert to fraction form
    643,917.20/965,875.80 = 288,942.80/x
  3. Step 3: Cross multiply
    643,917.20x = 965,875.80 × 288,942.80
  4. Step 4: Simplify right side
    643,917.20x = 279,082,858,104.24
  5. Step 5: Solve for x
    x = 279,082,858,104.24/643,917.20
  6. Step 6: Final answer
    x = 433,414.20

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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.