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Finding the Fourth Proportional to 695.88, 962.14 and 665.28

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Solution

The fourth proportional to 695.88, 962.14 and 665.28 is: 919.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.88 : 962.14 = 665.28 : x
  2. Step 2: Convert to fraction form
    695.88/962.14 = 665.28/x
  3. Step 3: Cross multiply
    695.88x = 962.14 × 665.28
  4. Step 4: Simplify right side
    695.88x = 640,092.50
  5. Step 5: Solve for x
    x = 640,092.50/695.88
  6. Step 6: Final answer
    x = 919.83

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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.