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Finding the Fourth Proportional to 1,285.42, 1,773.88 and 695.96

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Solution

The fourth proportional to 1,285.42, 1,773.88 and 695.96 is: 960.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.42 : 1,773.88 = 695.96 : x
  2. Step 2: Convert to fraction form
    1,285.42/1,773.88 = 695.96/x
  3. Step 3: Cross multiply
    1,285.42x = 1,773.88 × 695.96
  4. Step 4: Simplify right side
    1,285.42x = 1,234,538.92
  5. Step 5: Solve for x
    x = 1,234,538.92/1,285.42
  6. Step 6: Final answer
    x = 960.42

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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.