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Finding the Fourth Proportional to 318.21, 476.91 and 173.63

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Solution

The fourth proportional to 318.21, 476.91 and 173.63 is: 260.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.21 : 476.91 = 173.63 : x
  2. Step 2: Convert to fraction form
    318.21/476.91 = 173.63/x
  3. Step 3: Cross multiply
    318.21x = 476.91 × 173.63
  4. Step 4: Simplify right side
    318.21x = 82,803.50
  5. Step 5: Solve for x
    x = 82,803.50/318.21
  6. Step 6: Final answer
    x = 260.22

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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.