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Finding the Fourth Proportional to 982.38, 1,473.11 and 571.64

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Solution

The fourth proportional to 982.38, 1,473.11 and 571.64 is: 857.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.38 : 1,473.11 = 571.64 : x
  2. Step 2: Convert to fraction form
    982.38/1,473.11 = 571.64/x
  3. Step 3: Cross multiply
    982.38x = 1,473.11 × 571.64
  4. Step 4: Simplify right side
    982.38x = 842,080.52
  5. Step 5: Solve for x
    x = 842,080.52/982.38
  6. Step 6: Final answer
    x = 857.18

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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.