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Finding the Fourth Proportional to 1,272.76, 1,754.60 and 936.07

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Solution

The fourth proportional to 1,272.76, 1,754.60 and 936.07 is: 1,290.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272.76 : 1,754.60 = 936.07 : x
  2. Step 2: Convert to fraction form
    1,272.76/1,754.60 = 936.07/x
  3. Step 3: Cross multiply
    1,272.76x = 1,754.60 × 936.07
  4. Step 4: Simplify right side
    1,272.76x = 1,642,419.36
  5. Step 5: Solve for x
    x = 1,642,419.36/1,272.76
  6. Step 6: Final answer
    x = 1,290.44

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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.