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Finding the Fourth Proportional to 313,494.28, 431,638.80 and 276,662.80

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Solution

The fourth proportional to 313,494.28, 431,638.80 and 276,662.80 is: 380,926.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,494.28 : 431,638.80 = 276,662.80 : x
  2. Step 2: Convert to fraction form
    313,494.28/431,638.80 = 276,662.80/x
  3. Step 3: Cross multiply
    313,494.28x = 431,638.80 × 276,662.80
  4. Step 4: Simplify right side
    313,494.28x = 119,418,398,996.64
  5. Step 5: Solve for x
    x = 119,418,398,996.64/313,494.28
  6. Step 6: Final answer
    x = 380,926.88

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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.