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Finding the Fourth Proportional to 275,005.44, 379,530.72 and 154,144.80

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Solution

The fourth proportional to 275,005.44, 379,530.72 and 154,144.80 is: 212,732.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,005.44 : 379,530.72 = 154,144.80 : x
  2. Step 2: Convert to fraction form
    275,005.44/379,530.72 = 154,144.80/x
  3. Step 3: Cross multiply
    275,005.44x = 379,530.72 × 154,144.80
  4. Step 4: Simplify right side
    275,005.44x = 58,502,686,928.26
  5. Step 5: Solve for x
    x = 58,502,686,928.26/275,005.44
  6. Step 6: Final answer
    x = 212,732.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.