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Finding the Fourth Proportional to 1,273.82, 1,757.78 and 714.26

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Solution

The fourth proportional to 1,273.82, 1,757.78 and 714.26 is: 985.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273.82 : 1,757.78 = 714.26 : x
  2. Step 2: Convert to fraction form
    1,273.82/1,757.78 = 714.26/x
  3. Step 3: Cross multiply
    1,273.82x = 1,757.78 × 714.26
  4. Step 4: Simplify right side
    1,273.82x = 1,255,511.94
  5. Step 5: Solve for x
    x = 1,255,511.94/1,273.82
  6. Step 6: Final answer
    x = 985.63

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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.