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Finding the Fourth Proportional to 382.07, 526.64 and 257.69

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Solution

The fourth proportional to 382.07, 526.64 and 257.69 is: 355.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.07 : 526.64 = 257.69 : x
  2. Step 2: Convert to fraction form
    382.07/526.64 = 257.69/x
  3. Step 3: Cross multiply
    382.07x = 526.64 × 257.69
  4. Step 4: Simplify right side
    382.07x = 135,705.94
  5. Step 5: Solve for x
    x = 135,705.94/382.07
  6. Step 6: Final answer
    x = 355.19

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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.