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Finding the Fourth Proportional to 253.53, 382.32 and 217.89

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Solution

The fourth proportional to 253.53, 382.32 and 217.89 is: 328.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.53 : 382.32 = 217.89 : x
  2. Step 2: Convert to fraction form
    253.53/382.32 = 217.89/x
  3. Step 3: Cross multiply
    253.53x = 382.32 × 217.89
  4. Step 4: Simplify right side
    253.53x = 83,303.70
  5. Step 5: Solve for x
    x = 83,303.70/253.53
  6. Step 6: Final answer
    x = 328.58

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.