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Finding the Fourth Proportional to 368.69, 553.25 and 214.39

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Solution

The fourth proportional to 368.69, 553.25 and 214.39 is: 321.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.69 : 553.25 = 214.39 : x
  2. Step 2: Convert to fraction form
    368.69/553.25 = 214.39/x
  3. Step 3: Cross multiply
    368.69x = 553.25 × 214.39
  4. Step 4: Simplify right side
    368.69x = 118,608.81
  5. Step 5: Solve for x
    x = 118,608.81/368.69
  6. Step 6: Final answer
    x = 321.70

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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.