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Finding the Fourth Proportional to 1,277.59, 1,763.07 and 718.03

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Solution

The fourth proportional to 1,277.59, 1,763.07 and 718.03 is: 990.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.59 : 1,763.07 = 718.03 : x
  2. Step 2: Convert to fraction form
    1,277.59/1,763.07 = 718.03/x
  3. Step 3: Cross multiply
    1,277.59x = 1,763.07 × 718.03
  4. Step 4: Simplify right side
    1,277.59x = 1,265,936.66
  5. Step 5: Solve for x
    x = 1,265,936.66/1,277.59
  6. Step 6: Final answer
    x = 990.88

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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.