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Finding the Fourth Proportional to 982.32, 1,355.58 and 589.20

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Solution

The fourth proportional to 982.32, 1,355.58 and 589.20 is: 813.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.32 : 1,355.58 = 589.20 : x
  2. Step 2: Convert to fraction form
    982.32/1,355.58 = 589.20/x
  3. Step 3: Cross multiply
    982.32x = 1,355.58 × 589.20
  4. Step 4: Simplify right side
    982.32x = 798,707.74
  5. Step 5: Solve for x
    x = 798,707.74/982.32
  6. Step 6: Final answer
    x = 813.08

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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.