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Finding the Fourth Proportional to 982.86, 1,354.77 and 817.62

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Solution

The fourth proportional to 982.86, 1,354.77 and 817.62 is: 1,127.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.86 : 1,354.77 = 817.62 : x
  2. Step 2: Convert to fraction form
    982.86/1,354.77 = 817.62/x
  3. Step 3: Cross multiply
    982.86x = 1,354.77 × 817.62
  4. Step 4: Simplify right side
    982.86x = 1,107,687.05
  5. Step 5: Solve for x
    x = 1,107,687.05/982.86
  6. Step 6: Final answer
    x = 1,127.00

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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.