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Finding the Fourth Proportional to 1,086.89, 1,628.92 and 437.27

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Solution

The fourth proportional to 1,086.89, 1,628.92 and 437.27 is: 655.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.89 : 1,628.92 = 437.27 : x
  2. Step 2: Convert to fraction form
    1,086.89/1,628.92 = 437.27/x
  3. Step 3: Cross multiply
    1,086.89x = 1,628.92 × 437.27
  4. Step 4: Simplify right side
    1,086.89x = 712,282.47
  5. Step 5: Solve for x
    x = 712,282.47/1,086.89
  6. Step 6: Final answer
    x = 655.34

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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.