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Finding the Fourth Proportional to 1,357.12, 1,872.84 and 736.12

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Solution

The fourth proportional to 1,357.12, 1,872.84 and 736.12 is: 1,015.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,357.12 : 1,872.84 = 736.12 : x
  2. Step 2: Convert to fraction form
    1,357.12/1,872.84 = 736.12/x
  3. Step 3: Cross multiply
    1,357.12x = 1,872.84 × 736.12
  4. Step 4: Simplify right side
    1,357.12x = 1,378,634.98
  5. Step 5: Solve for x
    x = 1,378,634.98/1,357.12
  6. Step 6: Final answer
    x = 1,015.85

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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.