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Finding the Fourth Proportional to 1,672.74, 2,308.36 and 926.73

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Solution

The fourth proportional to 1,672.74, 2,308.36 and 926.73 is: 1,278.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,672.74 : 2,308.36 = 926.73 : x
  2. Step 2: Convert to fraction form
    1,672.74/2,308.36 = 926.73/x
  3. Step 3: Cross multiply
    1,672.74x = 2,308.36 × 926.73
  4. Step 4: Simplify right side
    1,672.74x = 2,139,226.46
  5. Step 5: Solve for x
    x = 2,139,226.46/1,672.74
  6. Step 6: Final answer
    x = 1,278.88

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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.