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Finding the Fourth Proportional to 382.56, 573.60 and 238.40

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Solution

The fourth proportional to 382.56, 573.60 and 238.40 is: 357.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.56 : 573.60 = 238.40 : x
  2. Step 2: Convert to fraction form
    382.56/573.60 = 238.40/x
  3. Step 3: Cross multiply
    382.56x = 573.60 × 238.40
  4. Step 4: Simplify right side
    382.56x = 136,746.24
  5. Step 5: Solve for x
    x = 136,746.24/382.56
  6. Step 6: Final answer
    x = 357.45

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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.