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Finding the Fourth Proportional to 318.48, 476.95 and 263.29

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Solution

The fourth proportional to 318.48, 476.95 and 263.29 is: 394.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.48 : 476.95 = 263.29 : x
  2. Step 2: Convert to fraction form
    318.48/476.95 = 263.29/x
  3. Step 3: Cross multiply
    318.48x = 476.95 × 263.29
  4. Step 4: Simplify right side
    318.48x = 125,579.25
  5. Step 5: Solve for x
    x = 125,579.25/318.48
  6. Step 6: Final answer
    x = 394.31

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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.