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Finding the Fourth Proportional to 696.44, 1,043.79 and 285.35

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Solution

The fourth proportional to 696.44, 1,043.79 and 285.35 is: 427.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.44 : 1,043.79 = 285.35 : x
  2. Step 2: Convert to fraction form
    696.44/1,043.79 = 285.35/x
  3. Step 3: Cross multiply
    696.44x = 1,043.79 × 285.35
  4. Step 4: Simplify right side
    696.44x = 297,845.48
  5. Step 5: Solve for x
    x = 297,845.48/696.44
  6. Step 6: Final answer
    x = 427.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.