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Finding the Fourth Proportional to 695.59, 959.91 and 380.85

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Solution

The fourth proportional to 695.59, 959.91 and 380.85 is: 525.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.59 : 959.91 = 380.85 : x
  2. Step 2: Convert to fraction form
    695.59/959.91 = 380.85/x
  3. Step 3: Cross multiply
    695.59x = 959.91 × 380.85
  4. Step 4: Simplify right side
    695.59x = 365,581.94
  5. Step 5: Solve for x
    x = 365,581.94/695.59
  6. Step 6: Final answer
    x = 525.57

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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.