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Finding the Fourth Proportional to 695.44, 959.72 and 380.70

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Solution

The fourth proportional to 695.44, 959.72 and 380.70 is: 525.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.44 : 959.72 = 380.70 : x
  2. Step 2: Convert to fraction form
    695.44/959.72 = 380.70/x
  3. Step 3: Cross multiply
    695.44x = 959.72 × 380.70
  4. Step 4: Simplify right side
    695.44x = 365,365.40
  5. Step 5: Solve for x
    x = 365,365.40/695.44
  6. Step 6: Final answer
    x = 525.37

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1.5x scale

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.