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Finding the Fourth Proportional to 437.82, 656.99 and 393

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Solution

The fourth proportional to 437.82, 656.99 and 393 is: 589.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.82 : 656.99 = 393 : x
  2. Step 2: Convert to fraction form
    437.82/656.99 = 393/x
  3. Step 3: Cross multiply
    437.82x = 656.99 × 393
  4. Step 4: Simplify right side
    437.82x = 258,197.07
  5. Step 5: Solve for x
    x = 258,197.07/437.82
  6. Step 6: Final answer
    x = 589.73

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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.