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Finding the Fourth Proportional to 1,276.56, 1,917.54 and 953.91

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Solution

The fourth proportional to 1,276.56, 1,917.54 and 953.91 is: 1,432.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.56 : 1,917.54 = 953.91 : x
  2. Step 2: Convert to fraction form
    1,276.56/1,917.54 = 953.91/x
  3. Step 3: Cross multiply
    1,276.56x = 1,917.54 × 953.91
  4. Step 4: Simplify right side
    1,276.56x = 1,829,160.58
  5. Step 5: Solve for x
    x = 1,829,160.58/1,276.56
  6. Step 6: Final answer
    x = 1,432.88

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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.