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Finding the Fourth Proportional to 1,256.82, 1,736.08 and 965.70

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Solution

The fourth proportional to 1,256.82, 1,736.08 and 965.70 is: 1,333.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,256.82 : 1,736.08 = 965.70 : x
  2. Step 2: Convert to fraction form
    1,256.82/1,736.08 = 965.70/x
  3. Step 3: Cross multiply
    1,256.82x = 1,736.08 × 965.70
  4. Step 4: Simplify right side
    1,256.82x = 1,676,532.46
  5. Step 5: Solve for x
    x = 1,676,532.46/1,256.82
  6. Step 6: Final answer
    x = 1,333.95

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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.