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Finding the Fourth Proportional to 382.45, 525.50 and 312.34

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Solution

The fourth proportional to 382.45, 525.50 and 312.34 is: 429.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.45 : 525.50 = 312.34 : x
  2. Step 2: Convert to fraction form
    382.45/525.50 = 312.34/x
  3. Step 3: Cross multiply
    382.45x = 525.50 × 312.34
  4. Step 4: Simplify right side
    382.45x = 164,134.67
  5. Step 5: Solve for x
    x = 164,134.67/382.45
  6. Step 6: Final answer
    x = 429.17

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.