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Finding the Fourth Proportional to 656.22, 905.62 and 361.50

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Solution

The fourth proportional to 656.22, 905.62 and 361.50 is: 498.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.22 : 905.62 = 361.50 : x
  2. Step 2: Convert to fraction form
    656.22/905.62 = 361.50/x
  3. Step 3: Cross multiply
    656.22x = 905.62 × 361.50
  4. Step 4: Simplify right side
    656.22x = 327,381.63
  5. Step 5: Solve for x
    x = 327,381.63/656.22
  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.