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Finding the Fourth Proportional to 715.26, 986.73 and 494.52

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Solution

The fourth proportional to 715.26, 986.73 and 494.52 is: 682.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.26 : 986.73 = 494.52 : x
  2. Step 2: Convert to fraction form
    715.26/986.73 = 494.52/x
  3. Step 3: Cross multiply
    715.26x = 986.73 × 494.52
  4. Step 4: Simplify right side
    715.26x = 487,957.72
  5. Step 5: Solve for x
    x = 487,957.72/715.26
  6. Step 6: Final answer
    x = 682.21

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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.