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Finding the Fourth Proportional to 318.10, 477.10 and 123.05

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Solution

The fourth proportional to 318.10, 477.10 and 123.05 is: 184.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.10 : 477.10 = 123.05 : x
  2. Step 2: Convert to fraction form
    318.10/477.10 = 123.05/x
  3. Step 3: Cross multiply
    318.10x = 477.10 × 123.05
  4. Step 4: Simplify right side
    318.10x = 58,707.16
  5. Step 5: Solve for x
    x = 58,707.16/318.10
  6. Step 6: Final answer
    x = 184.56

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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.