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Finding the Fourth Proportional to 382.31, 526.93 and 315.75

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Solution

The fourth proportional to 382.31, 526.93 and 315.75 is: 435.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.31 : 526.93 = 315.75 : x
  2. Step 2: Convert to fraction form
    382.31/526.93 = 315.75/x
  3. Step 3: Cross multiply
    382.31x = 526.93 × 315.75
  4. Step 4: Simplify right side
    382.31x = 166,378.15
  5. Step 5: Solve for x
    x = 166,378.15/382.31
  6. Step 6: Final answer
    x = 435.19

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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.