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Finding the Fourth Proportional to 656.97, 906.62 and 358.21

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Solution

The fourth proportional to 656.97, 906.62 and 358.21 is: 494.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.97 : 906.62 = 358.21 : x
  2. Step 2: Convert to fraction form
    656.97/906.62 = 358.21/x
  3. Step 3: Cross multiply
    656.97x = 906.62 × 358.21
  4. Step 4: Simplify right side
    656.97x = 324,759.69
  5. Step 5: Solve for x
    x = 324,759.69/656.97
  6. Step 6: Final answer
    x = 494.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.