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Finding the Fourth Proportional to 1,335.67, 1,842.62 and 863.38

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Solution

The fourth proportional to 1,335.67, 1,842.62 and 863.38 is: 1,191.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,335.67 : 1,842.62 = 863.38 : x
  2. Step 2: Convert to fraction form
    1,335.67/1,842.62 = 863.38/x
  3. Step 3: Cross multiply
    1,335.67x = 1,842.62 × 863.38
  4. Step 4: Simplify right side
    1,335.67x = 1,590,879.24
  5. Step 5: Solve for x
    x = 1,590,879.24/1,335.67
  6. Step 6: Final answer
    x = 1,191.07

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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.