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Finding the Fourth Proportional to 382.60, 574.93 and 209.40

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Solution

The fourth proportional to 382.60, 574.93 and 209.40 is: 314.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.60 : 574.93 = 209.40 : x
  2. Step 2: Convert to fraction form
    382.60/574.93 = 209.40/x
  3. Step 3: Cross multiply
    382.60x = 574.93 × 209.40
  4. Step 4: Simplify right side
    382.60x = 120,389.30
  5. Step 5: Solve for x
    x = 120,389.30/382.60
  6. Step 6: Final answer
    x = 314.66

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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.