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Finding the Fourth Proportional to 382.72, 530.14 and 351.94

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Solution

The fourth proportional to 382.72, 530.14 and 351.94 is: 487.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.72 : 530.14 = 351.94 : x
  2. Step 2: Convert to fraction form
    382.72/530.14 = 351.94/x
  3. Step 3: Cross multiply
    382.72x = 530.14 × 351.94
  4. Step 4: Simplify right side
    382.72x = 186,577.47
  5. Step 5: Solve for x
    x = 186,577.47/382.72
  6. Step 6: Final answer
    x = 487.50

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.