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Finding the Fourth Proportional to 275,628.48, 380,337.60 and 154,782.88

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Solution

The fourth proportional to 275,628.48, 380,337.60 and 154,782.88 is: 213,583.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,628.48 : 380,337.60 = 154,782.88 : x
  2. Step 2: Convert to fraction form
    275,628.48/380,337.60 = 154,782.88/x
  3. Step 3: Cross multiply
    275,628.48x = 380,337.60 × 154,782.88
  4. Step 4: Simplify right side
    275,628.48x = 58,869,749,100.29
  5. Step 5: Solve for x
    x = 58,869,749,100.29/275,628.48
  6. Step 6: Final answer
    x = 213,583.69

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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.