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Finding the Fourth Proportional to 659.85, 910.60 and 361.09

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Solution

The fourth proportional to 659.85, 910.60 and 361.09 is: 498.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.85 : 910.60 = 361.09 : x
  2. Step 2: Convert to fraction form
    659.85/910.60 = 361.09/x
  3. Step 3: Cross multiply
    659.85x = 910.60 × 361.09
  4. Step 4: Simplify right side
    659.85x = 328,808.55
  5. Step 5: Solve for x
    x = 328,808.55/659.85
  6. Step 6: Final answer
    x = 498.31

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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.