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Finding the Fourth Proportional to 1,273.67, 1,757.45 and 776.46

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Solution

The fourth proportional to 1,273.67, 1,757.45 and 776.46 is: 1,071.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273.67 : 1,757.45 = 776.46 : x
  2. Step 2: Convert to fraction form
    1,273.67/1,757.45 = 776.46/x
  3. Step 3: Cross multiply
    1,273.67x = 1,757.45 × 776.46
  4. Step 4: Simplify right side
    1,273.67x = 1,364,589.63
  5. Step 5: Solve for x
    x = 1,364,589.63/1,273.67
  6. Step 6: Final answer
    x = 1,071.38

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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.