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Finding the Fourth Proportional to 270,385.41, 405,636.30 and 80,860.80

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Solution

The fourth proportional to 270,385.41, 405,636.30 and 80,860.80 is: 121,308.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,385.41 : 405,636.30 = 80,860.80 : x
  2. Step 2: Convert to fraction form
    270,385.41/405,636.30 = 80,860.80/x
  3. Step 3: Cross multiply
    270,385.41x = 405,636.30 × 80,860.80
  4. Step 4: Simplify right side
    270,385.41x = 32,800,075,727.04
  5. Step 5: Solve for x
    x = 32,800,075,727.04/270,385.41
  6. Step 6: Final answer
    x = 121,308.60

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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.