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Finding the Fourth Proportional to 382.65, 527.26 and 315.51

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Solution

The fourth proportional to 382.65, 527.26 and 315.51 is: 434.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.65 : 527.26 = 315.51 : x
  2. Step 2: Convert to fraction form
    382.65/527.26 = 315.51/x
  3. Step 3: Cross multiply
    382.65x = 527.26 × 315.51
  4. Step 4: Simplify right side
    382.65x = 166,355.80
  5. Step 5: Solve for x
    x = 166,355.80/382.65
  6. Step 6: Final answer
    x = 434.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.