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Finding the Fourth Proportional to 1,986.24, 2,979.52 and 832.32

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Solution

The fourth proportional to 1,986.24, 2,979.52 and 832.32 is: 1,248.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.24 : 2,979.52 = 832.32 : x
  2. Step 2: Convert to fraction form
    1,986.24/2,979.52 = 832.32/x
  3. Step 3: Cross multiply
    1,986.24x = 2,979.52 × 832.32
  4. Step 4: Simplify right side
    1,986.24x = 2,479,914.09
  5. Step 5: Solve for x
    x = 2,479,914.09/1,986.24
  6. Step 6: Final answer
    x = 1,248.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.