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Finding the Fourth Proportional to 437.05, 655.48 and 386.43

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Solution

The fourth proportional to 437.05, 655.48 and 386.43 is: 579.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.05 : 655.48 = 386.43 : x
  2. Step 2: Convert to fraction form
    437.05/655.48 = 386.43/x
  3. Step 3: Cross multiply
    437.05x = 655.48 × 386.43
  4. Step 4: Simplify right side
    437.05x = 253,297.14
  5. Step 5: Solve for x
    x = 253,297.14/437.05
  6. Step 6: Final answer
    x = 579.56

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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.