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Finding the Fourth Proportional to 1,285.82, 1,774.43 and 696.35

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Solution

The fourth proportional to 1,285.82, 1,774.43 and 696.35 is: 960.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.82 : 1,774.43 = 696.35 : x
  2. Step 2: Convert to fraction form
    1,285.82/1,774.43 = 696.35/x
  3. Step 3: Cross multiply
    1,285.82x = 1,774.43 × 696.35
  4. Step 4: Simplify right side
    1,285.82x = 1,235,611.98
  5. Step 5: Solve for x
    x = 1,235,611.98/1,285.82
  6. Step 6: Final answer
    x = 960.96

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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.