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Finding the Fourth Proportional to 712.80, 982.94 and 502.88

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Solution

The fourth proportional to 712.80, 982.94 and 502.88 is: 693.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.80 : 982.94 = 502.88 : x
  2. Step 2: Convert to fraction form
    712.80/982.94 = 502.88/x
  3. Step 3: Cross multiply
    712.80x = 982.94 × 502.88
  4. Step 4: Simplify right side
    712.80x = 494,293.44
  5. Step 5: Solve for x
    x = 494,293.44/712.80
  6. Step 6: Final answer
    x = 693.45

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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.