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Finding the Fourth Proportional to 318.21, 476.98 and 235.59

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Solution

The fourth proportional to 318.21, 476.98 and 235.59 is: 353.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.21 : 476.98 = 235.59 : x
  2. Step 2: Convert to fraction form
    318.21/476.98 = 235.59/x
  3. Step 3: Cross multiply
    318.21x = 476.98 × 235.59
  4. Step 4: Simplify right side
    318.21x = 112,371.72
  5. Step 5: Solve for x
    x = 112,371.72/318.21
  6. Step 6: Final answer
    x = 353.14

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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.