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Finding the Fourth Proportional to 656.23, 905.59 and 361.51

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Solution

The fourth proportional to 656.23, 905.59 and 361.51 is: 498.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.23 : 905.59 = 361.51 : x
  2. Step 2: Convert to fraction form
    656.23/905.59 = 361.51/x
  3. Step 3: Cross multiply
    656.23x = 905.59 × 361.51
  4. Step 4: Simplify right side
    656.23x = 327,383.63
  5. Step 5: Solve for x
    x = 327,383.63/656.23
  6. Step 6: Final answer
    x = 498.89

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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.