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Finding the Fourth Proportional to 712.92, 982.80 and 565.32

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Solution

The fourth proportional to 712.92, 982.80 and 565.32 is: 779.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.92 : 982.80 = 565.32 : x
  2. Step 2: Convert to fraction form
    712.92/982.80 = 565.32/x
  3. Step 3: Cross multiply
    712.92x = 982.80 × 565.32
  4. Step 4: Simplify right side
    712.92x = 555,596.50
  5. Step 5: Solve for x
    x = 555,596.50/712.92
  6. Step 6: Final answer
    x = 779.33

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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.