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Finding the Fourth Proportional to 641,236.80, 961,628.40 and 220,414.80

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Solution

The fourth proportional to 641,236.80, 961,628.40 and 220,414.80 is: 330,544.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,236.80 : 961,628.40 = 220,414.80 : x
  2. Step 2: Convert to fraction form
    641,236.80/961,628.40 = 220,414.80/x
  3. Step 3: Cross multiply
    641,236.80x = 961,628.40 × 220,414.80
  4. Step 4: Simplify right side
    641,236.80x = 211,957,131,460.32
  5. Step 5: Solve for x
    x = 211,957,131,460.32/641,236.80
  6. Step 6: Final answer
    x = 330,544.24

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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.