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Finding the Fourth Proportional to 982.30, 1,355.61 and 589.30

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Solution

The fourth proportional to 982.30, 1,355.61 and 589.30 is: 813.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.30 : 1,355.61 = 589.30 : x
  2. Step 2: Convert to fraction form
    982.30/1,355.61 = 589.30/x
  3. Step 3: Cross multiply
    982.30x = 1,355.61 × 589.30
  4. Step 4: Simplify right side
    982.30x = 798,860.97
  5. Step 5: Solve for x
    x = 798,860.97/982.30
  6. Step 6: Final answer
    x = 813.26

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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.