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Finding the Fourth Proportional to 695.28, 959.60 and 415.43

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Solution

The fourth proportional to 695.28, 959.60 and 415.43 is: 573.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.28 : 959.60 = 415.43 : x
  2. Step 2: Convert to fraction form
    695.28/959.60 = 415.43/x
  3. Step 3: Cross multiply
    695.28x = 959.60 × 415.43
  4. Step 4: Simplify right side
    695.28x = 398,639.75
  5. Step 5: Solve for x
    x = 398,639.75/695.28
  6. Step 6: Final answer
    x = 573.35

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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.