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Finding the Fourth Proportional to 641,227.80, 961,614.90 and 220,405.80

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Solution

The fourth proportional to 641,227.80, 961,614.90 and 220,405.80 is: 330,530.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,227.80 : 961,614.90 = 220,405.80 : x
  2. Step 2: Convert to fraction form
    641,227.80/961,614.90 = 220,405.80/x
  3. Step 3: Cross multiply
    641,227.80x = 961,614.90 × 220,405.80
  4. Step 4: Simplify right side
    641,227.80x = 211,945,501,326.42
  5. Step 5: Solve for x
    x = 211,945,501,326.42/641,227.80
  6. Step 6: Final answer
    x = 330,530.74

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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.