Home / 1,276.28-1,915.34-454.56

Finding the Fourth Proportional to 1,276.28, 1,915.34 and 454.56

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Solution

The fourth proportional to 1,276.28, 1,915.34 and 454.56 is: 682.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.28 : 1,915.34 = 454.56 : x
  2. Step 2: Convert to fraction form
    1,276.28/1,915.34 = 454.56/x
  3. Step 3: Cross multiply
    1,276.28x = 1,915.34 × 454.56
  4. Step 4: Simplify right side
    1,276.28x = 870,634.68
  5. Step 5: Solve for x
    x = 870,634.68/1,276.28
  6. Step 6: Final answer
    x = 682.17

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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.