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Finding the Fourth Proportional to 1,272.77, 1,756.32 and 713.14

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Solution

The fourth proportional to 1,272.77, 1,756.32 and 713.14 is: 984.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272.77 : 1,756.32 = 713.14 : x
  2. Step 2: Convert to fraction form
    1,272.77/1,756.32 = 713.14/x
  3. Step 3: Cross multiply
    1,272.77x = 1,756.32 × 713.14
  4. Step 4: Simplify right side
    1,272.77x = 1,252,502.04
  5. Step 5: Solve for x
    x = 1,252,502.04/1,272.77
  6. Step 6: Final answer
    x = 984.08

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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.