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Finding the Fourth Proportional to 382.18, 572.30 and 312.52

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Solution

The fourth proportional to 382.18, 572.30 and 312.52 is: 467.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.18 : 572.30 = 312.52 : x
  2. Step 2: Convert to fraction form
    382.18/572.30 = 312.52/x
  3. Step 3: Cross multiply
    382.18x = 572.30 × 312.52
  4. Step 4: Simplify right side
    382.18x = 178,855.20
  5. Step 5: Solve for x
    x = 178,855.20/382.18
  6. Step 6: Final answer
    x = 467.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.