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Finding the Fourth Proportional to 318.18, 476.26 and 207.61

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Solution

The fourth proportional to 318.18, 476.26 and 207.61 is: 310.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.18 : 476.26 = 207.61 : x
  2. Step 2: Convert to fraction form
    318.18/476.26 = 207.61/x
  3. Step 3: Cross multiply
    318.18x = 476.26 × 207.61
  4. Step 4: Simplify right side
    318.18x = 98,877.01
  5. Step 5: Solve for x
    x = 98,877.01/318.18
  6. Step 6: Final answer
    x = 310.76

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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.