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Finding the Fourth Proportional to 1,273.63, 1,757.99 and 776.51

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Solution

The fourth proportional to 1,273.63, 1,757.99 and 776.51 is: 1,071.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273.63 : 1,757.99 = 776.51 : x
  2. Step 2: Convert to fraction form
    1,273.63/1,757.99 = 776.51/x
  3. Step 3: Cross multiply
    1,273.63x = 1,757.99 × 776.51
  4. Step 4: Simplify right side
    1,273.63x = 1,365,084.14
  5. Step 5: Solve for x
    x = 1,365,084.14/1,273.63
  6. Step 6: Final answer
    x = 1,071.81

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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.