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Finding the Fourth Proportional to 1,086.44, 1,630.90 and 437.64

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Solution

The fourth proportional to 1,086.44, 1,630.90 and 437.64 is: 656.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.44 : 1,630.90 = 437.64 : x
  2. Step 2: Convert to fraction form
    1,086.44/1,630.90 = 437.64/x
  3. Step 3: Cross multiply
    1,086.44x = 1,630.90 × 437.64
  4. Step 4: Simplify right side
    1,086.44x = 713,747.08
  5. Step 5: Solve for x
    x = 713,747.08/1,086.44
  6. Step 6: Final answer
    x = 656.96

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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.