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Finding the Fourth Proportional to 1,329.65, 1,836.46 and 886.78

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Solution

The fourth proportional to 1,329.65, 1,836.46 and 886.78 is: 1,224.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.65 : 1,836.46 = 886.78 : x
  2. Step 2: Convert to fraction form
    1,329.65/1,836.46 = 886.78/x
  3. Step 3: Cross multiply
    1,329.65x = 1,836.46 × 886.78
  4. Step 4: Simplify right side
    1,329.65x = 1,628,536.00
  5. Step 5: Solve for x
    x = 1,628,536.00/1,329.65
  6. Step 6: Final answer
    x = 1,224.79

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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.