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Finding the Fourth Proportional to 641,226.80, 961,613.40 and 220,404.80

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Solution

The fourth proportional to 641,226.80, 961,613.40 and 220,404.80 is: 330,529.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,226.80 : 961,613.40 = 220,404.80 : x
  2. Step 2: Convert to fraction form
    641,226.80/961,613.40 = 220,404.80/x
  3. Step 3: Cross multiply
    641,226.80x = 961,613.40 × 220,404.80
  4. Step 4: Simplify right side
    641,226.80x = 211,944,209,104.32
  5. Step 5: Solve for x
    x = 211,944,209,104.32/641,226.80
  6. Step 6: Final answer
    x = 330,529.24

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Similar ratio
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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.