Home / 641,285.76-961,918.88-220,565.28

Finding the Fourth Proportional to 641,285.76, 961,918.88 and 220,565.28

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Solution

The fourth proportional to 641,285.76, 961,918.88 and 220,565.28 is: 330,844.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,285.76 : 961,918.88 = 220,565.28 : x
  2. Step 2: Convert to fraction form
    641,285.76/961,918.88 = 220,565.28/x
  3. Step 3: Cross multiply
    641,285.76x = 961,918.88 × 220,565.28
  4. Step 4: Simplify right side
    641,285.76x = 212,165,907,104.49
  5. Step 5: Solve for x
    x = 212,165,907,104.49/641,285.76
  6. Step 6: Final answer
    x = 330,844.56

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Double scale
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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.